Told you about this six months ago...  
Good update, however waaaay to late but hey, better late than never.
My advice is that you should listen to your users a little bit more closely.
All communication channels with you guys are cluttered with nonsense and spam.
Little few is there to actually help or provide information. Byte16 here and one more person at slack, don't even mention telegram. So, taking this update as a rule of thumb, alternative to googles recaptcha available in 6 months? Hope not. There was a time when solvemedia was a thing, why not both? I would prefer text based captcha.