The term "scope creep" comes up a lot, but to be honest that's not happening here.
They have no scope in the first place. No coherent vision.
The say surface-level vision-like things and present scope-like plans, but only as disposable tools to get investment. No single person in that company tries to tie it together to a real scope or real vision, or align development with it.
Smart and capable people work on any random game-like stuff that they find interesting, in the hope that it will all somehow become a complete experience all by itself.