I actually bought one of the Amazon digital versions of basic Rift to start Ascend a Friend from a registered account for my other four trial copies.

At this point, though, I'm guessing that buying Storm Legion for $19.99 will be a better option. The basic game comes with it plus the new souls plus 30 days free game time (or F2P credit for a month at this point I guess). Amazon offers it for that price, but the estimated delivery date is weeks away. Gamespot has the same price if you can find enough local copies.