The problem is that the teen audience is fickle and doesn't want to be commingled with adults. So if Snapchat grows massively, they're going to have to deal wit

The problem is that the teen audience is fickle and doesn't want to be commingled with adults. So if Snapchat grows massively, they're going to have to deal with that reality. Some people are worried about the ads and monetization driving away audience, but I think teens are used to subsidized apps—instant messenger, Shazam, Pandora, etc. I think the biggest problem will be sustained interest and popularity in the face of a much larger, much more aware older demo coming in.