captcha is useless. That's why. You need more than that.
Just my personal opinion that has nothing to do with Dfans Services and upcoming improvements!
Interessting point from you. I think personally the reCaptcha Service from google is working pretty fine. In my mainjob i have to maintain different plattforms and we are pretty satisified with it. And if the bots don't cycle the registration through proxys and proxy networks, it is almost pretty easy to identify recurring ip adresses within the registration process and drop them if you operate on core or root base.
I had recaptcha on couple of my forums and bots still made like 20 accs every day. Sometimes 40.
Captcha is just a script, and for every script there's another script which decyphers it. So i gave up on this and just use third-party paid service and a plugin. And i disabled all captchas and 0 bots now. For a very small fee per year i have three headache-free forums
there are enough captchas and anti robot techniques that cant be solved programmatically.