Recently found this website through a friend:
http://www.prizerebel.com/index.php?r=3712404
It has offers you can do (there are a lot of easy ones that just require giving an email) to earn "points." After you get some points you can get different prizes including the Ultimate Game Card (which can be used to purchase CE or used in a ton of other games). Just thought people may want to know if they are looking for other ways to get started getting CE and are new or don't want to actually purchase any.
Realize just how easy this is. Been doing some of these offers in my spare time between doing different things and already have more than enough to get a $5 Ultimate Game Card code. So if you have spare time to do things like this I would suggest it. I would also suggest completing offers with a junk email account because of inevitable spam.