Nope, from what I said, there is always profit on every gambling site, more over if they have this huge traffic as you have right here. From so many similar wagering contest you should gain good profit to share for every winners here. 50% is really a good deal to have and that is why you wagering contest always succeed because of this extra prizepool. Many sites will be jealous on this kindness
It is just matter of time when you are going to gai back from your loss( if only there is a little bit loss )

The house edge used to be 0.5% as far as I can remember so giving people 50% of the house edge in a prize pool for one currency is literally like saying (we're temporarily going to how things used to be for this coin and making it into a competition to get more people betting with that currency). I think the site started by offering a zero percent house edge too but I might be wrong there...