That's not what this thread is about; the OP explicitly said "for an upcoming product". As I see it, it depends on the default. If you are already actively ta

That's not what this thread is about; the OP explicitly said "for an upcoming product". As I see it, it depends on the default. If you are already actively taking on users but are throttling the sign-ups due to unexpectedly high demand, that's much more legitimate than just getting people's emails into a list, knowing it will be months before you're able to sign them up.