Yes. Kids show each other something funny on their phones, look cool to their peers, ask where they got it, and download that app so they can use it themselves. It's not any more complicated than that. They don't care what the older kids or parents have installed on their phones, or whether they already have something installed that could accomplish that same task. They just want the funny thing their cooler friend showed them. You want to start a new Facebook clone, just write features for following and sharing, get some critical mass of 13-year-olds to try it simultaneously, and make some content they find amusing to show each other. Social media platforms are only as sticky, it turns out, as the extent to which they are the originating point for the most viral content on the web. If 4chan or SomethingAwful were profit-maximizing businesses, they'd rule the internets.