I am guessing they increased the threshold to removed the captcha from 30k and double. My account which has 0.02445289 BTC which is 2.04 free roll winnings of 0.01195256 BTC is still captcha free, but my brother who is at .00435995 BTC which is 5.77 his free roll winnings of .00075533 BTC needs to fill out a captcha to claim.