On CCB running the card for Robinhood, that's very expected, my last paragraph was about them probably outsourcing it.

Yes, not all accounts will revolve and be charged interest, many will. credit card balances have been going up for decades: https://fred.stlouisfed.org/series/REVOLSL (This is ALL revolving credit, not only credit cards, but it's mostly credit cards). It's well over 1 trillion dollars now. Yes there are cost(s), but credit is a very strong and well run business now and is absolutely a profit center for banks. If they get too many freeloaders that don't carry balances to hit their income targets, they will add some fine print to curtail freeloader use-cases enough that they can hit their income targets. This has been going on for decades now.