I really unsure about EGS monetization model, but Psyonix (developer of Rocket League) are subsidiary of Epic. UPD: At least while ago in 2019 Epic claimed to

I really unsure about EGS monetization model, but Psyonix (developer of Rocket League) are subsidiary of Epic. UPD: At least while ago in 2019 Epic claimed to give a choice of payment processor to use for games on their store: https://www.gamesindustry.biz/articles/2019-12-06-epic-games-store-implements-in-game-purchases-for-third-parties https://www.gamesindustry.biz/articles/2019-12-06-epic-games...