i have asked bee-ads support via email.. got this:

We are currently charging 12.5% fee from bids <=0.01 BTC
                                         15% fee from bids > 0.01 BTC


just checked what carlos posted in adbit.co thread.. he's taking 40% of every bid.. no wonder freebit.co left his platform... im thinkin about it as well, because its way too much..