The trick with Tighten the Belt, if I understand it correctly, is that it forces you to hang tight for one round with let's say 2 heroes, and not spend their resources to then gain more. It's good for aggro decks, since they tend to run punchy heroes who can afford not dropping allies or equipment, but if you *need* cards out early it forces you not to do so for a whole round. Unless, as often happens, I'm totally missing the point?
That said, I like the card a lot, and it offers more variety for resource generation, always a good thing.