I haven’t read the whole of this thread, but it seems to me that unless you’re totally paranoid (in which case you shouldn’t be engaging in this hobby), I can’t see what the fuss I all about.
I have a punting email address. As for my use of AW, I’ve had an account since it started, but I very seldom opened it since I never use their booking system (except for that rare occasion) and have never written an AW review. If the SP didn’t display a phone number or email address, then (again, except for that rare occasion) I looked elsewhere. Hence, I didn’t need to log into my account.
This has had an unfortunate consequence. During the lockdown, AW sent an email to my punting address to the effect that as my account had been dormant for a long time, they were going to deactivate it unless I responded to the email within a set time. That time was long gone by the time I decided to resume punting and read the email.
I wasn’t going to bother opening a new account, but with their rule change, I’ve had to. It’s no big issue.