Dear @kingscrown,
I went to the "Free Bitcoin" link, I registered to the website with your referrer code, I rolled the dice and earned the minimum of 0.00000018 BTC, that is 0.002 USD. At this pace, after 5 hours I will get my first cent of a dollar... I know it is for free, but is a long way to go before getting rich.
Anyway minimun withdrawal is 0.0003BTC (30USD circa). Playing 8 times a day I should get there after 200 days. Better not miss a roll!