Cheers Mike

I'm not the one you replied to, but I just purchased it too. You don't need to give a phone number. It's optional.
You do but you could always put a old phone number in, it's always best though to give your number if they need to get hold of you.
Yeah, the permanent keys are lifetime keys so regardless of what happens with the beta, if you purchased a key for MakeMKV then it should work indefinitely.