There's no question that this will be pulled soon. The question is: will Apple also disable the app remotely for all those who purchased it, something that is possible, but (I believe) unprecedented.
They did not do it for the previous iteration of the concept (Netshare, those who kept it can still use it, although I'm not sure it still works on recent iOS versions). It's very unlikely they'd do it this time either, remote kill is for actively dangerous/harmful applications and they'd get a complete shitstorm using their killswitch for this.
The much more elegant solution for Apple is to make this app silently stop working with the next OS update.