I'm with Crothian on this. I give out Hero Points instead. Interestingly, my players like that better. Having the chance to reroll a die is very valuable. Especially since in my game the PCs are near death on a regular basis. My players will lie, cheat, and steal for a single Hero Point. Likewise, they tend to regard advancement as one of the sacred cows that grazes in the sanctum sanctorum, and prefer that it be earned in-game. I am of like mind.