carol: i feel clear talking about snapchat and we've not mentioned the founder and ceo, evan speigel.e is such a big part in terms of them momentum behind us. reporter: it's a great story, and what is kind of amazing about it is that this company has sort of been mocked at every turn. originally, snapchat was kind of dismissed as kind of a thing for sending lewd pictures or what have you. carol: we all remember that. reporter: that could not be a major advertising vehicle, that is for sex. no advertiser would want to be associated with that. and then, they created this sort of media play where they were charging very high advertising rates, and he was made fun of for that. he was reportedly offered something like $3 billion from facebook, turned it down. and yet, despite all of these sort of seemingly counterintuitive, not quite straight down the middle moves, snapchat is doing amazingly well. and you know, this media play, which looked insane, like why would you want to read the wall street journal next to your sex? people, first of all, there's a lot more happening than dirty pictur