[compsciphd]

eventually they let you in. i think its somewhat ip reputation based (with reputation being how many captches have been solved from that ip). i.e. I've temporarily "burnt" my local IP by doing too many captches in a short period of time so that it wont allow me in easily (i.e. captcha after captchas, probably spend a minute or 2 doing all of them before I get through). However, after some period of time, it resets and allows me in more easily

[WarOnPrivacy]

> eventually they let you in.

Often they don't. I've run Google out past 20 attempts and not gotten in. More common are 10x-15x rounds that dump me back to the Sorry page.

[compsciphd]

I've had that on rare occasions, but only when coming from a VPN IP that was really burnt. Never from my own, where it just seemed I did too many captchas in a short period of time.