Sales are not profit. R* didn't make a billion dollars in one day. GTA V sold $1B worth of copies in a day. At best R* will see about 40% of that. Even then, VCs aren't going to just jump at game development. GTA is the exception, not the rule. It cost over $265M and took somewhere in the neighborhood of five years to make GTA V. During development *every* R* studio was involved with it. There were no other games in production. There was no fallback plan, essentially. GTAV was risky every way you look at it. Mitigating that risk was the fact that it was GTA and that R* has a proven record of being able to deliver. While that's great for them it's only great for them. Take an extremely large random collection of game developers, give them $265M and five years to make a game. You won't see $1B in sales on the first day. Chances are depressingly better than average that you won't break even. Except for the large well established studios (studios, not publishers) it's a very risky industry. VCs are generally risk averse.