Exactly how do you get negative rakeback ?

I just checked my stats at raketherake for the first time and it says i have given -1.00 in rake and earned -.30 in rakeback. Now i know the -1.00 means i have paid 1.00 in rake. The -.30 is what has me confussed. The - mark makes it look like the .30 will be deducted from my account and not added. Would someone please explain?

there may be something screwed up with RTR's raketracker this month. Its only showing ~1/2 of what i should be getting in RB.

FTP? From RTR FAQ

Why do I have negative rakeback at Full Tilt?

Full Tilt deduct for a number of things from a player's rake before they calculate rakeback.

1. Bonus
2. Deposit transaction fees (you should not withdraw and re-deposit unnecessarily). These range from 3% upwards.
3. Items bought in the FT store using FT points are deducted at $0.005 per point from your Rake (and $0.00135 from your rakeback).
4. Any tournaments you enter where there is a guaranteed prize and there is a shortfall in players. The amount deducted from your rake is equal to the amount of the overlay divided by the number of entrants.