FWIW, when I used my Vanilla gift card to buy a non-reoccurring upgrade on SV**, PayPal accepted it with no question*. I haven't looked at what (if any) upgrades QQ offers, so I don't know if that's a workable option here. * This is, of course, the point of Vanilla gift cards. ** Of reasonable note is that the upgrade I bought I paid a lump sum for -- I believe it was $25. In this case, lump sum $25 wouldn't work for you guys.