Anyway, these recaptchas are not longer used, currently there are more and more “I’m not a Bot” tests where you have to slide an block to the right or direct an marking field where the test ist based on the cursor move (humans curser move is never so exact and straight forward as one of an bot), since recaptchas and also traditional captchas nowadays, more with corresponding AI apps which solve it better than humans, useless. In accounts, to avoid spambots you even don’t need an captcha, its enough to wait half an hour before sending the activation mail, due that spambots use an temporary disposable mail, they never receive it. This methode has shown as the most effective in several forums I know.