ive got a 2002 chevy s10 and i was looking around and found some chips. but do they do what there worth?

no

I agree, NO. And I burn them. You only need a custom chip when your modifications require it.
If you buy every dime store item that claims 10 hp. You should be getting 500 hp out of a SBC with a K&N, Chip, and widget adapter!

Don't bother.

Diesel yes,
Gas, don't waste your money.