If you want to earn a few satoshi on freebitco.in, first stop playing Hi Lo game, who will most probably make you lose the satoshi you've earned elsewhere.
Then collect every hour, promote your referral link, use your browser to mine. If you can, make a small deposit on there (30000 satoshi) so that you can start earn interest everyday and you won't have captcha anymore when playing free roll.
What you say makes a lot of sense. Have you cashed out on that site?