I find that when I solve a Captcha too quickly, I get another one. And another one. And another one. So instead, I wait a short time, click a few wrong boxes, then enter the correct Captcha. Maybe this is part of it, but I don't like it.
If the Buster plugin can't solve the reCaptcha for me [It does fail from time to time] then I just don't bother visiting that website. Or if it's a site I need to use, then I'll try again later and see if I either get let in without being asked to jump through hoops, or get a reCaptcha Buster can solve.
I simply refuse to waste my time and drive up my blood pressure by doing unpaid training work for Google's AI, in order to visit some crappy website. I really wish more people would start boycotting any site which uses reCaptcha [or its derivatives], so we could get rid of this blight on the internet.
I've spotted this new hCaptcha junk show up recently on a couple of sites I used to frequent. I don't visit those sites any more. So well done webmasters. Apparently annoying the shit out of visitors to your site tends to drive them away. Who'da thunk it?!
I have my email address listed in plain text on my website and with a simple regular expression to to reject the standard pharma/bitcount/etc. spams at the SMTP level based on subject there is at most a couple of spam emails pair day. Hardly takes any time to go through that.
Use the recaptcha after form submission only, rather than on the whole website. Then at least the user is incentivised to do it as a last step of a process, as opposed to being stopped in their tracks before they even got to visit the website.