Obviously there's a non-zero cost for developers to publish thru multiple stores, so it makes sense to try to incentivize them with a greater share of revenue. It would be interesting if they tried to leverage the popularity of Fortnite to also do this on Android.
Just wait until digital distribution services catch up to console levels of bullshit and start licencing exclusives or "exclusive for X months after launch" for bigger titles.
https://arstechnica.com/gaming/2018/12/epic-undercuts-steam-...
> Sweeney told Ars that the company plans to "start small" and will "sometimes fund developers to release games exclusively through the store," Sweeney told Ars.