1.- tried all popular plugins. didn’t work. You should know that: you changed the registration/login system so you know this incompatibility. You have eliminated the possibility of working with captchas. Don’t you think this is very important?
2.- do you have any documentation so I can customize those registration/login/lost password forms?
Seems to me that you have no help to bring, leaving me with spammers and no solutions. Or paying you an extra (I’m sorry but it seems a bit extortive to me) to solve this security issue.
I think I am never trust Porto again (after buying 5 licenses). So many problems, so much time wasted.