Used to be wayyyyy back in the day you could reload your prepaid cards with a credit card.
Heck, years ago you used to also be able to buy currency for face value from the US government with a credit card. Guys would buy $10K of coinage from the USG, then take it to the bank and cash it in, pay off the card, and boom, 10K points.
Now, the easiest thing I’ve found to do is find a close friend who’s nearby (or family), PPFF them with a CC, pay the small fee, have them cash you out, then they deposit the money in their bank from PP.
It’s not huge but an extra 2500 points a month begins to add up.