They probably did market research and figured out that the vast majority of drivers don't care about Top Tier certification, so why bother.

Remember, GetGo is the gas station that was pretty much created around the "spend $50, save 10 cents a fill up" to drive people to shop at Giant Eagle. And people went gaga for it, to save $1.50 when spending $50.

Plus, with how they're gutting the current perks program to whatever the new MyPerks is (much worse) it seems they're re-aligning their model to be less of a shopping driver to an Sheetz-type high markup convenience store that happens to have gas.