If we're including free rolls I'll withdraw my funds now and get an infinite percentage!

But that's not a bad idea though (unless people find a trick to do with the bonus on the multiply thing or just bet with tiny amounts, doubling a sat isn't as interesting as doubling a bitcoin).

AS already said, the strategy is a Martingale one, and if you return to base bet after 4 losses in a row, you will lose 15 satoshis. You will then need to win 16 times without losing more than 4 times in a row to actually earn 1 satoshi in total.
With a 47,5% winning rate, you have 7,6% risk to have 4 losses in a row, higher than the 6,6% needed to win 16 times without losing 4 times in a row.
Otherwise said, you will lose at the end.

There is no such rule that one should win 10 and lose 7 but it can happen reverse as well so, in the end, you may still lose money. So the basic rule, don't aim profit from the gambling games instead just go for fun and if your lucky on any day then you will make some free money, as well as you, get free entertainment. You remember to fix your budget in gambling before you overspend on these games.

Thanks for your knowledge sharing, but i can't believe that some one can take money from the bookmakers, not one hundred percent, sorry.
One more thing, i'm Viet Dzung from Discord, hi Queen 

Er, no, the thread related to Freebitco.in is very much alive. Practically getting more active in the last few months actually ever since it got a dedicated user being admin. Anyway, it's a faucet site after all, rather than a casino. So if you think about it, if you're only there to claim faucet Bitcoins, then you already win, with no risk of losing anything except a few minutes a day (like me haha).

Official thread for discussion - https://bitcointalk.org/index.php?topic=320959

You were just lucky if you have not lost anything by using the strategy, as previously said that it is just a basic martingale strategy which is proven to be the most dangerous strategy. Even worst, you use it on a dice game with higher house edge.
Even if you start with 1 satoshi, but once you face worst losing streak then it will make you lose so huge amount of money fast.