No, I have no purpose for it, but I'm in my 40s. Twitter and Facebook are the only social media platforms I use.
To say snapchat has no basis in trading porn is to say that pornhub could relaunch itself tomorrow and say "oh sorry we're just a youtube knockoff now, we're not in the adult industry."
Well, it would still say pornhub in the URL, wouldn't it. And it would still be a site whose entire userbase was built on trading porn. That's what Snapchat built and used to grow its userbase, so trying to re-image themselves after getting the money is dubious at best.