In my world, I don’t use much data every month, but there are certain times I could really use more on a backup device. I could certainly justify spending $40 on a sim for a 10 GB of data IF
a) it is activated for one year, instead of one month, and
b) unused data is rolled over when renewed.
That’s a real incentive for me. I dropped T-mobile after 20 loyal years because you made it worth my while at Republic. Keep that tradition alive!
PS: I sure wouldn’t mind a data rollover on my primary phone as well.