I've heard it said from people who work in the industry that your credit rating isn't a measure of your ability to pay, but rather a measure of how profitable a customer you are. I've also heard people saying that you have to carry a balance, have a rotating pool of debt, or make a payment a little late on rare occasion "to keep up your score". If that's true, essentially that means your credit rating is an investment, something you have to spend money to maintain--and should be afforded the same consideration you give to any other investment; i.e. what's the ROI? Most of the other reasons given for maintaining a high credit score would just be fear tactics at best or scams at worst.
Is that true?
Additional info: I don't want this to come off as "anti-credit" and confuse my question. In my belief, credit is very useful. Properly handled, both sides benefit, just as two parties do in any good economic transaction.
I'm interested in the interpretation of the credit score as something that costs money to raise. Is that true? And if so, can we analyze its return on investment? If that ROI is bad, are people getting scammed when they intentionally carry balances on multiple cards (or whatever) in order to raise their credit ratings?
Hopefully that clears up what I'm asking.