I wonder what happens when the last whale has been milked dry.
I have some bad news for you friend.
I work at a casino. There is no end of whales. There are whales that are rich enough to sustain their habits and spend more than you or I could morally spend if we had the means. Then, there are whales that spend outside their means, burn out, and are replaced by a new person who does the same thing.
When a whale (highroller) stops coming, we usually assume they’ve gone to one of our competitor’s casinos.
I see no reason why this wouldn’t apply to real-money transactions in video games. It’s just another casino.