Part of the martingale strategy is the fact that you need the funds to survive a couple of consecutive losses.
With about 450 Satoshi per payout, it takes a few days to collect enough, especially if you want to play with a minimum stake of 10 instead of 1 for example. I'm currently trying to build up a budget there.
That's why I thought I'd offer it for those interested. In my test runs it worked, although it turns out I need to be able to survive more tan 16 losses in a row
You cannot earn a fortune on freebitco.in, but it's entertaining to play around. Worst case you lose a dollar or two only.