Yeah Eriskay, I live in a cave too. I don’t have either, either. Nor Facebook.
This is a personal use thing. I got sucked into being a Patreon patron (don’t ask) and part of the perks involves one or the other of those two platforms. Nothing globally earth shattering. Leaning towards IG as that seems to be the easiest to disentangle from later when I lose interest. Just wondering what others thought.