A recently leaked Target ad announced that they’d have SNES Classics available online on November 1, but the catch is that it’s only going to be available for Target REDCard holders.
I wouldn’t bother with this if you don’t otherwise shop at Target, but if you do with any regularity at all, you really ought to get a REDCard anyway. It comes in both credit and debit card varieties (the latter just draws directly from any checking account), has no annual fee, and gets you 5% off everything Target sells, plus free shipping on all online orders. There’s really no downside.