Regarding the captcha, as far as I know you should deposit an amount equal to your free roll earnings and it will be removed from your account. You can see your earnings by clicking Stats -> Personal Stats. For example if you have earned 100 000 satoshis, the captcha will be removed if you deposit 100 000 satoshis, but I recommend you deposit a bit more because the captcha may appear again if you continue to earn using free rolls. Please correct me if I'm wrong.
I can confirm that this could be possibly true (https://bitcointalk.org/index.php?topic=320959.msg25688240#msg25688240), but a lot of speculation could be made... Is there an official statement somewehere about how the captcha removal actually works?
Why the hell are there 2 topics with the same exact name? This is so confusing!
