The main point is why would we take a look at only the purchased tickets, I mean if the date is set on 6 months then we can discuss about it anyway. What are the tickets received for? Affiliate income? Well why not? You are giving that away already, people would withdraw instead of playing so even that is a profit for you. Gambling?

Well, you have 5% house edge which we accept because the website offers a lot more stuff but it is one of the biggest I have ever seen. Free faucet on the other hand gives out literally less than 2 cents to everyone. I don't know what could be the reason you consider only 0.5 bitcoin of the tickets sold as "real" and the others are "given away" but in reality I honestly believe none of it was given away, these are money you may not have seen if you didn't had the contest so its all a profit for freebitcoin if you ask me.