I bought one (1) $250 Visa yesterday. I still have a stash from the March 3X day that covers my category-shifting for the next two months, but I likely won't be able to partake in a 3X day in the near future due to travel sans laptop (*). The $250 purchase gets me the mystery bonus (500 miles) and completes my AA Executive MC minimum spend, so I can put that card away and focus my everyday "spend efforts" elsewhere.

(*) I noticed that the gc.com page on AA Shopping doesn't seem to have the warning about Safari not tracking the site anymore. Has the problem been confirmed to be resolved and would purchases made with an iPad and Safari now track?