I have my forum set up so I have to approve each request manually. We're a small, private group, and so this isn't open to the general public. I have several reasons for wanting to sue reCaptcha. The GD image options are terribly hard to read by many humans. While they probably work well to keep out spambots, I can't even read them myself so I'm not going to subject my users to them. I've had trouble with Q&A in the past, too. I've gone so far as to put in the question things like "Just type the word purple" and my users still get confused. Simple image is what I'm using, and I get dozens or more spam user requests daily, and they are increasing.
I had reCaptcha working in the past, but now it will not. I've got my public and private keys configured for reCaptcha v2. However when I go to the user registration page, instead of the reCaptcha, it displays a message that reCaptcha v1 is no longer supported. This suggests to me that PHPBB is still calling the v1 api. Is anyone else experiencing this, and is there a way around it?