So let me asking you which part does cost you money?
Lottery tickets that are given with free rolls are 100% free. Freebitco has the biggest faucet among all the websites I know. They give the users free lottery tickets too. It's great. But the tickets are given with wagering are not 100% free. Considering the 5% house edge, every ticket costs you 25 Satoshi.
And where is the problem? These tickets are not forced on you. Some people are willingly buy those tickets to increase their chances. If there weren't choices like these the site wouldn't make any money. Lottery round 223 has a winner on the 2nd spot with 37 tickets. 37. Let that sink in for a while. Among all those accounts with 10k-100k and even 40 million (!) tickets, some freebie dude with 37 damn tickets wins the 2nd biggest prize.