Someone will get rich turning this into a browser plug-in.
deathbycaptcha does not let anyone simply sign up to work.
That's rough, but you could scale it up I guess. Didn't know that about dbc, thank you.
Websites will very quickly pivot to alternative solutions like payment card verfification, etc.
A lot of bots also use VPNs and Tor so captchas being a pain in the ass is probably working as intended, that way most people won't bother using services like that? This is different from regular internet users, there is no reason to make their life more difficult than necessary.
IPv6, 3G/4G/5G or public Wifi can increase that to about every 10 queries on Google for a CAPTCHA. I guess VPN too increase the probability to get a CAPTCHA.