Actually, their whole “disappearing messages” thing was perfectly positioned for the teen market as the polar opposite of “post once and it’s there forever” Facebook. I never used it myself, but for a certain subset of people, not just dick pic senders, this was a pretty big differentiator/selling point. Enabling a whole new class of behavior for millions of people.

So yeah, although the innovation never progressed beyond a killer feature for some users, it was still... innovative.

Technologically maybe - but I think it did define the idea of a social network being primarily (if not entirely) phone/camera based. I had been off social media for years but found Snapchat fun and interesting enough to rejoin (for a few years)