I don't know if it will be profitable in the end...
He collected monthly subscription money while working on this for
4 years, 2 of which where he almost solely worked on MW3. Not only has he
already profited, MW3 is easily the most profitable thing he's ever made and it isn't even out yet. He's made more off of MW3 alone than most porn artists make in their whole careers, so don't lose sleep over whether or not it was "profitable" for him - the unfortunate thing is that it
was rather than it being a costly lesson to him.
Regardless of how good or bad the story is in this porn movie, the fact that it's incest which is popular, short film length, and animated at his quality level is going to flood him with supporters. It could be a complete dud story-wise and the novelty and/or rarity of a long form 3d incest animation alone will be enough to make MW3 a success post release as much as it's already been financially a success for him in development hell.