Fortnite has the support-a-creator program, where players can enter a creator's code in the in-game item shop to choose to divert a percentage (5%, but they have upped it to 20% once for a special event) of all in-game purchasers to a creator of their choice. The creator can be a map-maker, streamer, blogger, etc.
The program incentivizes continued content creation by creators, and dis-incentivizes moving on to another game, as the creator's SAC revenue would dry up over time.