Interesting, though I wonder how many will actually do this. They are newbies, what are the chances they come across this option before they rank up to Jr. Member, which isn't too much. If they find it when they have say 15 activity points, will it be worth it? So I think it should be an option when someone creates an account.
I think that Copper Membership is quite popular on Bitcointalk, I see many users wearing it. For example, ICO devs, service owners often buy this membership immediately after they buy account. And even after they reach Jr. Member rank this membership is still useful becauseit it gives some Member rank benefits (reduced PM limits, bigger signatures and etc.
Sometimes even Hero or Legendary members buying Copper Membership without any serious reason.
Now I'm understanding it better. I was assuming that it was a way for newbies to have simple benefits, such as no waiting 360 seconds before posts, and other such benefits that they would have once they reach Jr. Member. So I thought the copper membership would become obsolete once the member became a Jr. Member.
I'm guessing that if more bounty campaigns start accepting copper memberships instead of Newbies and JR. Members, it can reduce spam from bought and sold accounts.