Not pretending this is some new revelation or anything, but was wondering how many out there MS with the "offset method".
When I play Roulette, I make A Small Even-Money Bet to cover my potential loss, on the numbers I Play inside.

I just started this with MS. I recently was approved for United Club Card (1.5 miles per $). Long story short, basically, based on my location and travel needs, I need as many United miles as possible.

So, now, whenever I go to WM, I buy 8 VGC's. I buy 4 with United Club, then I buy 4 with Spark (ergo, the offset). So, I earn $5 on Each VGC purchased with Spark ($20), to offset The $20 I spend on my 4 VGC's bought on United Club.
Sooooooo, on 4, $500 VGC's purchased with United Club, I earn 3000 miles (basically free because cost was offset with Spark purchases). If I do this 3 Times per Week, Thats 9k miles Weekly, approx 450k miles Annually, pretty much free. Even when I discontinue United Club (after First Free Year), even if I do the same with United Explorer (1 mile per $), Thats 2k miles Daily, 6k Weekly, and potentially 300k miles, basically, at net zero cost.

I have MS'd on United before. I have MS'd on Spark. But never together like this. It seems like virtually limitless free miles because of this "offset" (Im sure you're tired of that word now, LOL).
And this estimate of mine is based on 1 store, 3 Times Weekly (because thats about what I do now). If I were to do this more often, I dont see why I (or anyone else) would ever not be able to fly at will, first class, anywhere I want, for virtually free. I will scale this Big Time.

Im sure many others do this, just curious as to methods, math, particulars.....
Have A Great Memorial Day, friends!