Yeah paying back early doesn’t affect it as far as I can tell. Lenders just want to know if you’ll leave them in the lurch or not. If you pay back early that just means they can reinvest the cash sooner.

You have great interest paying potential because of your reliable handling of finances, so your score is high to make it easy for you to take on a lot of debt down the road.

In another comment, someone mentioned that it’s not just repayment of interest that profits credit card companies.
Even if you pay all debts monthly before interest can compound, the CC companies still charge processing fees to merchants on a per-transaction basis (which merchants either pass directly to consumers or indirectly through higher prices). They still get their cut, even if you don’t see it on a line item.

Recently I had house work done. The contractor offered to charge me 5% less if I paid with cash or check instead of credit card.

There must be something else to it.

Massive understatement—it'd be more accurate to say they're completely wrong, lol.

Well the back need some safe bets as a baseline.