I remember when i was a nub and this person gave me a website for a free minecon cape. I ended up having to get a new account.
I'd rather have an Optifine cape since you can customize it. Not saying that the Minecon capes look bad, just that you can't do anything to them.
I examined the EULA, and no where does it state that MINECON capes are outlawed in Minecraft. The EULA only implies that capes that AREN'T from Minecon are prohibited (such as an MCcapes cape).