Absolutely. The fact that they know your app better than you do, and that they can revoke your ability to develop it at any moment, those are just details. Those things won't change the game at all.
Unless you're using their API (in which case there's always platform risk, same as before), this is not an issue. There are lots of half assed implementations of ideas by the big companies that smaller companies run circles around, Innovator's Dilemma was literally written about this.
Unless you're using their API (in which case there's always platform risk, same as before), this is not an issue. There are lots of half assed implementations of ideas by the big companies that smaller companies run circles around, Innovator's Dilemma was literally written about this.