I would say very few people know much of either. This whole situation is barely a few months old. Although I understand the point you are trying to make, it is a bad example. Ebay vs. Kickstarter. I'm not going to go into an analysis of how different these things are, you can work that out for yourself.
If I didn't knew better I'd get the impression you're talking down to me :D
You don't have to go into an in-depth analysis of how Ebay and Kickstarter are different, because the lines were used to make a different point; or rather an analogy if you will. Which you seem to have at least partly grasped.
We might be looking at the rise of a whole new market and in my humble opinion there are no fitting comparisons possible as of yet.
Ebay started with an innovative idea and quickly became the best known and renown website in their field, a household name almost. After savvy business people realized you could actually earn big moneyz with this idea and idealists thought you shouldn't have to pay for such services at all, over time many copycats arose.
Yet by the time this happened it was already too late, the big evil guy owned the lionshare. Thanks to early exposure and clever marketing techniques, he later on could basically dictate above average fees while the consumers didn't bother to look at alternatives too closely. This happened and still happens for a broad variety of reasons such as being familiar with the site and don't wanting to leave familiar grounds to open up an account someplace else, don't knowing about the better fees/prices on other sites, ebay is the biggest and most renown, therefore I can trust them while you I don't know much about the copycats etc. and so forth.
While not all of this can be adapted to the Kickstarter model, there are quite the number of similarities I can spot. So I don't think ebay is the worst of all examples. But one could easily replace ebay with other business models, such as Amazon or Google. The point is more that there's a new (or in some other cases also reborn) business model introduced and during the initial gold rush phase a couple smaller dogs face one big mofo of a dog in a contest to come out top dog.
People already go to Kickstarter and look for interesting projects that deserve their money out of their own initiative. Many of the users (and also project starters) don't go to Kickstarter with the sole intend to specifically support one single project because they got lead there from somewhere else.
While this is true for most categories on the site, the Games category is somewhat standing out, thanks to the latest high roller projects where people actually heard for the first time about Kickstarter and became exposed to the concept for the first time. But the situation is slowly normalising and even the Developers seem to have recognized the general MO of most users before the influx of newblood, as you can see for example by the "Kicking it Forward" initiative which has been created by inXile (in case you haven't heard about this: participating projects promise to kick back 5% of their profits to other Kickstarter projects). In an effort to "give back", or as a marketing guy would see it to bond with the indigenous population of multi-project supporting Kickstarter inhabitants.
This are all troubling developments in my eyes because it cements Kickstarter's position on the market as top dog.
You are following a different line of logic anyway and it isn't actually relevant this early on. Backers don't choose the platform, the project starters do. There have been only 4 or so 1 mil+ projects and they have all occurred within the past 2 or so months. Everything is driven by the original hype still. Looking for alternative rates was probably not even a consideration. Let us not pretend that those who have participated in these high-flying kickstarts expected the successes they have had. Many probably had significant reservations about even reaching their targets.
I've been involved with Kickstarter a bit before the super projects entered the circus. Perhaps that's why my line of logic differs from yours, still I'm not convinced mine's the wrong one.
The big projects with a lot of fans and PR momentum can choose the platform freely, yes. But a large portion of the Kickstarter Backers actually chose Kickstarter to be their platform of choice. And after the hype phase is over, the backers will be a much larger part in the equation which platform to choose for project starters. In turn limiting viable options to project starters. Can you see where I'm going with this?
If for example the Wasteland 2 project would have been posted on another funding site, I have no doubts whatsoever that it would have reached it's funding goal without problems as well. Yet the project appeared on Kickstarter. As did The Banner Saga and that ominous Hardcore Tactical Shooter.
Do you think with what is at stake the Developers did not took a minute before posting their projects to take a look at alternative routes? They probably were aware that there are other crowdfunding sites out there, yet they were so hyped by that single success story that they blindly jumped on the bandwagon, blissfully ignorant about other options open to them yelling "LETS JUST FUCKING DO IT, YEHAW!". Or perhaps it was a planed calculated risk move.
Doesn't really matter in the end, just time forward a couple months: There's so many projects out there (successful and non successful), it does not generate any significant media buzz as the first "pioneers" like Double Fine and Inxile did. Only the fanboys care at this point plus you got the occasional convert from news articles. Now you are facing even bigger problems.
You are a project starter. What do you think does it take to change your opinion on starting your project on Kickstarter?
When every high budget project so far went to Kickstarter and was successful, why start my project somewhere else? Wow, they charge 4% fees less. Yet I would probably get less exposure than on Kickstarter. Is it really worth it? Their userbase seems significantly bigger than crowdfunding site X. In the end I'll probably receive more than 4% higher funding on Kickstarter.
If the Kickstarter trend does not stop in the foreseeable future, further down the line there won't be a possibility to pose a realistic challenge to them. Kickstarter will just be the "go to solution" without any second looks at alternatives, for different reasons than in the initial hype phase you outline, but still with the same outcome.
Even with all of that aside, you are also assuming that "alternative" means only something that has lower rates, when it doesn't. No one said that there aren't any places which have lower rates, but they also don't have the same exposure yet, which is something that becomes a risk for the projects to take on when there is no proven market (again, barely a few months old). Eventually that uncertainty will be replaced with understandings about the size of the crowd-funded audiences and more healthy predictions of success, and when they act on that knowledge, they will make decisions that consider the economics better. It really isn't something they have the luxury of considering this early on.
The market is in the making right now, and Kickstarter is shaping up to become the ultimate "go to solution".
I took up the rate aspect specifically because it was mentioned by you. The exposure is another factor, which I took into account and actually tried to vocalize as well by using the Ebay/WeBidz analogy which as it seems, unfortunately has been misinterpreted by you. If the crowdsourcing business continues the way it seems to be heading right now, Kickstarter will become equivalent of what ebay is to the online auction market, or Amazon to the online retailer market, or Google to the search engine market (and I'm comparing positions on the market here, not business models).