For the longest time there seemed to be an unspoken agreement that 1% was the edge for offchain dice sites. I was curious when PD dropped their edge to 0.91% whether it would lead to a price war, resulting in a race to the bottom but apparently nobody cares. Dice players don't seem to care whether they are getting a 0.91% or 1% edge. Volume at PrimeDice's recently launched "PD3" site, with exciting new features (levels, achievements, player-vs-player, a faucet) has been matched very closely by that at dicebitco.in (no new features, 1% edge, no faucet), so I guess giving up almost 10% of expected profit is a losing move by PD that won't last too long.