They want it to work that way but as the posted link shows there is a bug currently so they can only give the tokens out monthly. They are working to fix it soonest.
But it's MY sadistic mechanical monster and I'm here to make sure it knows it. - Girl Genius
List of Invention Guides
I was under the impression that we would get all our tokens in advance if we purchased more than a month of game time. I went and bought a year subscription in hopes of getting the 12 Reward Tokens but upon logging in the game told me I had 0 unspent tokens and I'm still where I was yesterday in the tiers. Was I wrong about getting them upon purchase?
http://riskovinsheen.deviantart.com/
Light of the Phoenix - lvl 50 Fire/Emp Controller; Snow Panther - lvl 50 Cold/Ice Defender; Dragonfly. - lvl 50 Willpower/Fire Tanker; Magic Minx - lvl 50 Ill/Rad Controller; Dust Walker - lvl 50 Storm/Dark (Sand) Defender; And more...