Anons I think I figured out how the bots circumvent captchas. There's sites where people can earn money (3rd world wage) in bitcoin for solving, you guessed it, captchas. $1 per 1000 captchas on the site '2captcha'. It's set up multi-level marketing style where they incentivize bringing in productive new people more than actually solving captchas.

Other sites advertised by the same people are big pyramid schemes for microdonations that end up doubling your money in a few days until they collapse, robbing poor people that solved captchas for a few satoshits.