It is not true for all cases. Banned or not banned, it depends on evil score of exit node when you use Tor to create accounts. Evil scores are adjusted over time (no one knows how the score will be degraded over time, but theymos discloses it does degrade).

For real users, paying a few BTC to buy Copper Membership if a new account gets banned because of evil IP is not bad. It is acceptable. However, to have evil IPs that mean owners or users of those IPs are actually create many accounts (more than 3 in short period - I don't remember where I read it but I recalled that someone said so) then those people mainly feel unacceptable to pay for Copper Membership.