People who talk shit about Sapkowski how it's "his fault" have no experience with this, clearly.
I've been offered rev shares in a project that looked bleak to say the least. I debated this with myself for a week, I didn't take the shares. Then a year later, unexpectedly, the project looked much better. Still, I did the right thing, because unless you have gambling problems, you can't get rev shares from a studio in which you exert zero control and whose competence you cannot asses due to simply not being sufficiently informed and qualified. They can ruin the shit out of their project due to inexperience or other problems, and you'll have zero say in it, and your money will be gone. I also asked for everything up-front and a small percentage (the percentage was denied, due to the amount I requested in payment). Looks like he did almost the same.
Now if the project suddenly becomes a multi million franchise, obviously he deserves to be included into the profits. It's morally right, and it's legally right. Doesn't matter what he says about the game. Shit, I remember Leonard Nimoy spent almost his entire life hating on Spock, he even wrote a book that he called "I am not Spock". He avoided Comicon-like events like a plague. So what, he doesn't deserve money for his work or what exactly are you cunts saying? I loved Nimoy despite his views, and if you can't appreciate an artist despite his personal views, you're a dumbshit. (later in life he reverted back, wrote a book "I am Spock". I'm happy he got there, but there's never been any hate in me for his previous remarks).