It already costs 100$ to get a game on Greenlight, so people are willing to pay that and I think that's a good number to prevent spamming. 5K is definitely too high. I personally put a game on Steam and didn't make anything close to 5K. Thing is, I would have paid the 5K if I had to, but it would have turned out that I would have lost a sh*tload of money and that that money was instead in Valve's pockets, which would make me feel like I was swindled... So, seems like this new project of theirs is about raising the price. If they're going to do that, I suggest they stay below 500$. I think they should just leave it at 100$. I really don't think there's a problem with too many or too low quality games on Steam. You can get refunds, there's great reviews and you can filter things easily.