There are design flaws in the way reCAPTCHA works IMO. Unfortunately, only Google can address that and even if they did it would only make life a little more difficult for the bots.
I mean not about recaptcha
I propose making a new type of captcha with a special design for freebitco.in
I am sure wetsuit can make it, it's just about he has time or not
If a human can solve it then a bot can be programmed to solve it.
in this era I think there are still significant differences between bot and human
therefore I am very optimistic if there are ways to stop botnets that exploit free rolls
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may I know, how much is the average BTC paid by Freebitco.in to pay for free rolls game in 1 week ?