I got suprised by seeing user with only 100-200 tickets are wining 1st prize in jackpot there. If anybody from this forum have ever won the first prize of freebitco.in than it will be interesting to see your post here.
Their jackpot seems interesting.
Their jackpot completely depends on luck. According to the website, the jackpot round is another free roll for typical faucet users, who gets 2 free tickets on every round he claims the faucet. Now the jackpot bet is totally independent and isn't related to it's faucet. On an average, users with nearly 100-200 tickets wins but that's not the strategy.
For instance; look at round 13 and 20 here,Conclusion:
You'll just have to keep your fingers crossed and wait for your fate to get lucky.