I'm feeling a bit unlucky

Try to avoid the dice and don't spend all your campaign earnings there, better to store them.
Ahah! Exactly true! I really did that for some time, I lost the result of a few weeks of campaign on this ^^
I feel that they probably take back part of what they pay with this :p
I sat for like twenty minutes one day hitting the "Free Coins" on YoBit and ended up with this collection of coins way too low to trade, lol. SP then, the next night I sat putting them through the dice game until I lost them, it took way too long to lose those useless coins.