Like in theory Facebook could try something like that. This is a what if scenario still. If we look at android they have not pulled their Apps from googles stor

Like in theory Facebook could try something like that. This is a what if scenario still. If we look at android they have not pulled their Apps from googles store. So what is the basis they would do this for iOS? Moreover, depending how apple theoretically would release grip the have on other people's devices also plays into effect. If apple just let you load a signing key for the boot-rom and left it at that. The amount technical friction would likely be too high to be easily abused at large.