Get debt free?

I constantly hear all these commercials on the radio about how these companies will consolidate your debt and make it easy to pay. And how they are a non profit organization and you some how end up paying way less than you owed in the first place. Is this complete bullshit or is this legit?

I mean if it is legit i just dont see one why this company gives a rats ass about you if they arent making anything, and how exactly are they lowering your debt. I mean why would the credit card companies that you owe money to agree to take less money than you owed them in the first place?