Board Thread:Game Discussion/@comment-9083608-20130504011034/@comment-9079919-20130504182626

Commons wont give as much xp and take longer to level up a card. Plus they are more common (heh) so you'll get more of them then anything else. You should sell them so that you have the funds available to feed uncommons to rares.

I personally don't transcan or max out commons or uncommons as food. Too much time for me and not sure how much difference it makes. If you feed all your commons and uncommons to your rares you might start to run low on credits.

I can't tell you how often events are but I think they are pretty frequent now. Harvest of the Insecticons started in December. Then went on hiatus to fix problems/holiday, then resumed and concluded in January. Then it was a loooooong wait for Day of the Dinobots which was last month. Then I think from there it was 2 weeks for the Robots In the Sky and finally just one week after that for Fatale (something to this effect). So I think they are coming pretty frequently now. I read they have a Predacons episode coming eventually and Day of The Dinobots 2 is in the works (people are gonna go bananas for an episode super rare Grimlock).