This seems to be a little known secret but you can use Paypal billpay to pay off certain credit cards using a debit card like Fold. This allows you to double-dip in sats-back on top of your normal fiat credit card rewards.
I've been doing this successfully for several months now using my Citi DoubleCash card (flat 2%, no annual fee). From my conversations with a twitter friend who first shared this with me, it also works with his Amex, Amazon Visa, Target and Apple cards (I have not verified those). I haven't been able to add any of my Chase cards to Paypal Billpay unfortunately.
They changed the spin game recently to make it a bit harder to hoard spins, but so far over the past 3 months I've been getting well over 2% in sats back on top of my 2% DC points back. If you game it correctly, it is almost a guaranteed extra 1.5+% sats-back on your spend (I keep balance > $1k to get extra daily spins, play daily stupid VR game to get 3 extra spins, and I pay off my credit card bill in increments of $1300 every thursday night to maximize rewards combining thursday + friday spins + friday am bonus spins).
If you have ~3k in monthly credit card spend this comes out to $45-60 dollars in extra stacked sats, so the premium spin+ card pays for itself in 2 months. It doesn't sound like much but it's a nice mini raise in these times of rampant inflation. So far I've stacked over 6M sats in just over a year using this card.
Other than paying of my credit card bill, I mainly only use the Fold card for one daily small purchase <$5 (hitting monthly spend in sats back reward regularly gives me ~5000 sats back) and Amazon gift cards (5%+spin% via the app). I also use it for paying quarterly estimated taxes as you get back much more than the debit card fee.
Anyone else this trick to stack extra sats? Got a better strategy for maximizing sats back on fold spins?