Same here. The $500 Vanillas from CVS still work for me at WalMart and Kroger, but the USBs from Kroger stopped working about a month ago at Kroger and a week or so ago at WalMart.

Of course the USBs have so much fraud that they were an iffy choice. But for me, other than the occasional sign-up bonuses, only one card gives bonus miles at drugstores.

So for many of us, MSing was only profitable because a lot of cards have lucrative rewards for grocery store spending. So this puts a huge dent in Manufactured Spending.