I didn't dig into the financials all that much, or even listen to call so I'm approaching this from a place of ignorance, but I do happen to have five or six family members between the ages of 13 and 18 and all of them have unanimously reported to me that Snapchat is unequivocally over.
That's as anecdotal as it gets, but I'm also hard pressed to believe that they're all simultaneously unique. And as we've seen elsewhere in tech, once the "cool" vibe is gone (Yahoo, AOL, etc.), it's a long spiral to irrelevance.