Just taking the opportunity, many people complain about FreeBitco.in's house edge and FreeBitcoin's team likes to open promotions often, wouldn't it be possible to decrease house edge sometimes? Maybe for 1-2 days, like RP promotions for an example...
There are so many sites are runnings successfully with just 1% house edge and do handle even more bets and they also run a lot of promotions then why can't freebitco site permanently reduce the house edge to reasonable one?
If you want to run promotions should run with site profit but not from players money. 5% is too much for a dice game.