I still don't understand why the fuck you would want an autograph of some guys that make Minecraft let's plays.
The same reason you'd want to get an interview with somebody who's been in a movie. They're somewhat famous, and they entertain you.
Yeah but one person does something interesting for a living, the other... not so much. Plus there's a galaxy of difference in the level of fame there.
The whole concept of autographs is pretty stupid anyway, I'd rather just chat with someone rather than have them sign useless junk that I'll put on a shelf and never look at again.