> As young people increasingly reject social media, older generations increasingly embrace it.

This is like Tesla (and other startups generally) do it. Sell it to the rich people to garner attention, and then slowly when you've got enough growth/money/experience, sell it to others.

Teens were the lead users. Old people are just the laggards in social media.

Also, Facebook (in its infancy) used to be the place where cool teens hung out. Now if it's the place where your grand dad hangs out, it isn't so hip anymore. No surprise that teens would prefer dropping off.