Set app selling aside - I only mentioned that because it's a counterexample to your original post as stated. What TFA is about is selling in-app content from e

Set app selling aside - I only mentioned that because it's a counterexample to your original post as stated. What TFA is about is selling in-app content from external stores. Apple used to ban that entirely, and now wants a revenue share for it. Steam has never done either - they explicitly support it (via account integration). The two are not similar.