Deme

I think they might mean all european social media users. The vast majority of those are still on corpo socials.

Multiple pictures can be posted at a time by adding the other pictures as embeds to the text body of a post.

Thales’ Theorem

Funnily enough, my experience with Tumblr is purely second hand through screenshots like this :D

Does it though? The other user implies that the OOP is a clown who is narcissistic and likes themselves.