sser
you make valid and rational points, but I believe you're missing some of the fundamental issues many users are having with this whole "recent development".
Modding is not new nor terribly recent but for a few games with the "right" conditions it skyrocketed to unprecedented levels.
Yet a GREAT part of its charm was the very collaborative effort behind it, the acknowledgement than any mod must at least have been made out of passion or it wouldn't have been made in the first place, the good feeling that even as a simple feedback_giving user you were part of an ever improving and evolving community. One of the few recognizably good things (for what was worth) of this whole crazy interconnected age.
Now a few modders suddenly think/hope/imagine they can sell "their" [how much can really be "theirs" after all the iterations in recurring ideas, modding tools, brainstorming and all, remains of course open to debate] mods to large audiences as if the above ingredients hadn't been a factor in shaping that same audience's desires up until now.
Would I have even spent time "mod-hunting" and had fun in the very process in the absence of the aforementioned context?
I honestly don't think so, and it would have been about the mood of the thing as much as it would have been (necessarily) about the money.
In a few words I think Seller-Modders are doing the same mistake I think Beth is doing, that is, overestimating the attracting power of their "products" when considered as isolated objects, instead of a part of the strangely harmonized system that had been in place up until now.