Hi there. Twice I have activated SI captcha on my site and each time, rather than slow down the bogus registrations, they've increased dramatically. I had registrations I thought were from bots because showed no first and last names with usernames you knew no one could remember. When I activate SI captcha, I get registrations with first and last names and maybe 10 or 20 times more. I end up deleting two screens of bogus registrations.
And ideas why?