See for example DansDeals, Mommy Points, Point Me to the Plane, Delta Points, Running with Miles, Points Miles and Martinis
Vanilla Reloads were the lowest hanging fruit to manufactured spend for lots of miles and cashback and CVS was pretty much the only place left that you could buy them with a credit card. If you don't know why this is important, you can see this post to check out what you can't do anymore.
All good things must come to an end if it doesn't give any profit to the companies involved, but this one lasted a long time. Oh well. On to the next scheme, I mean idea.