Talking about the capes that are not from old events like Minecon I can say that I do know how to get most of the oter capes because of a YouTube video. Because of that I know how to get the translator cape, the Moderator Mojira (For Moderators right here, in this site, like the guy who commented to you) and some more... I think it is the main reason, YouTube is really powerful in leaking information about everything.
Talking about the capes that are not from old events like Minecon I can say that I do know how to get most of the oter capes because of a YouTube video. Because of that I know how to get the translator cape, the Moderator Mojira (For Moderators right here, in this site, like the guy who commented to you) and some more... I think it is the main reason, YouTube is really powerful in leaking information about everything.