Yes. No

Not anymore...unless you spend a certain amount of money for the Fold+ subscription you can't make enough sats to pay for the membership

The rewards have definitely decreased over time. However, they recently introduced the ability to pay your bills, such as your mortgage through ACH and earn rewards on that as well. So even though other credit cards have higher "rewards," I'm not earning those rewards in Bitcoin, which is the key value proposition. So yes, if you have fiat liabilities, Fold is worth it.