some folks just got really good at (making neural nets for) breaking CAPTCHAS
like... REALLY good, and pretty efficiently
and the full paper is open access soooo here it is!
"A generative vision model that trains with high data efficiency and breaks text-based CAPTCHAs"
http://science.sciencemag.org/content/early/2017/10/26/science.aag2612.full