Only problem is that with Rift, you need to manually track your hours - but its as simple as going to the Rift page on Raptr and clicking "Manually track playtime" or w/e on the left of the screen and enter how much time you intend on playing. 3 hours later, free game. Such a good deal.
Are Dimensions available to Rift Lite players? I started a Mage, but when I received the quest "Placing Dimension Items" and attempt to teleport to Warden's Point, it looks like it tries to load me into that place, but I end up eventually getting sent to Meridian.