"This project can't be deleted."

That's pretty good, since that way no one can lose access to the game. All I'll have to do is disable purchases once the sale end.

That would also explain why I still have access to Hikaru Imagination Rebellion pay-what-you-want game (I donated) even though the page had been hidden from the store.

Update: Well, actually, I don't have it anymore. It's gone with all other games by CureLovelyWarrior! So pay-what-you-want games can be deleted? Weird.