I could be mistaken, but I seem to remember having 0.002something BTC on Freebitco.in. Now I have 0.00018988..?
Has anyone else noticed a drop in the amount of BTC they have there?
I have never noticed a drop and I check each time I pay refferals back.
Perhaps have you ticked an automatic ref cash back?
Once I have paid too much my refferrals...I have set a false "zero"