During my first couple runs to Casey's, they asked for my ID and said there were 'fraud' concerns. But this was not brought up again for another two months until two weeks ago when I tried to double the miles with newly approved Ink. I tried three in the area and all of them quoted 'fraud' reasons and refused to take CC for GC. I guess it's hard coded in Casey's.
Meanwhile, WM isn't friendly to me any more either. I guess my more-than-frequent MO transactions raised a red flag. At first a gal refused to do MO for me at all and made me drive to the next town to do that. But I took my chances with other cashiers and got lucky. However, they only allowed me to do one MO a time and in one payment only, which means I can no more do two $500 GCs for a $1,000 MO.
Anyway, I still manage to buy GC with CC and find a new location that allows me do $1,000 MO for $1.
Although liquidating GCs is not as convenient as before, I survive.