Well, contribute to its development and help it speed it up.
That's funny, because all examples of creators getting a lot of money through subscriptions has always led them to effectively stop working altogether.
Just think of games like Summertime Saga which has made a fortune over all the years (at least several million USD), and then the update schedule goes from one month to half a year to something like one or two years, with less and less content. Now they even removed all the content to rewrite the game, taking years just to get back where they stopped.
Probably takes a lot of time and energy to spend all that subscription money. Like a weekend trip to Dubai in first class, then you need two weeks in Thailand or Monaco to cure that hangover. And then your 10.000$ E-Bike gets stolen, and you actually have to buy a new one. Jesus Christ, the stress of being rich.
And who can blame them, getting paid a hundred times the money they could get as social welfare in central europe, while owing absolutely nothing to their "investors" because it nominally is donation money.