No offense but, is it really necessary though?
Most major exchange are still accepting new members and only few has put a limit or completely stopping a new member to register.
I don't think this list won't get any bigger in future.
Anyway, last time I checked Bitfinex still accepting new member.
i guess its just temporary, i've tried to sign up in bittrex and i noticed that they stop accepting new members, the problem is many people joining the crypto space every day and it becomes bigger and bigger, will thes exchanges solve thier problem.