I think Odd would predominantly use Insta, mainly to post images/promotions regarding his shop, and to document whatever misadventures his Pokemon or himself got into that day.

He used to go on Twitter more often (and occasionally will sneak on to check out what his friends post), but with the discourse rabbit holes he had a tendency fall in when he was feeling down, Mauve tries to keep him away from the bird app

And occasionally he'll boot up Tumblr; when asked why he uses it, he'll respond "A walk through a wasteland can be refreshing, sometimes."