I am using freebitco.in since couple of years and trying to roll almost every day. But never won something big. I spent more than what i earned from free roll or multi. Spent few dollars on jackpot. But either its my luck or i have got bad client seed every time.
Is this your first time gambling anywhere? I am not asking this to diminish what you are living or you yourself, I am just really asking if it is or not. If it is your first time gambling somewhere then you should be quite obviously be aware of the fact that when you are gambling against a 5% house edge you will end up losing your money quite quickly, it is not really a shock, hell we have a 200k dollar worth lambo winner that barely made it even or maybe not even made it even after he won it, so dude lost more than 200k give or take until he won it, there are many that didn't get a 200k reward though, so many lost and got nothing (well free lottery tickets, lambo tickets, reward points and so forth).
This is gambling, you may end up getting lucky and win, that is why we all play, but the house edge means that in the long run you will always lose, that is just math. If you are not new, then you should have known this already.