2. Do you have plan feature which allow copper membership/registered user to bypass CloudFlare by present signed message with linked their Bitcoin address, show their linked certificate or confirm with their PGP signature?
I think bypass isn't possible if CloudFlare is active. Because if you use CloudFlare than you have to change original DNS ( Domain Name Server) to CloudFlare DNS. So you must enter domain in order to visit website. If you want to skip than you have to deactive ClouFlare from Name Server.
Both Tor and CloudFlare are being lazy, but i can accept with current condition since my main goal is to jump through censorship
Yes it's little bit lazy but CloudFlare high security in low cost, especially for DDOS attack.
I forget to mention there should be another domain (preferable .onion), but normally user only can see login page with input field signed message/PGP signature/certificate and register page which force copper membership.
To prevent spam, there should reCAPTCHA, but configured to allow JS-disabled browser to solve it.
Adding new subdomain will redirect you on main doamin. Once you click loging page than same thing will happen. But I think for reCAPTCHA problem could solve by CAPTCHA.
For Example
9+2=? If use this kind of CAPTCHA I think Tor browser will not face problem.