What about Pinterest? Laugh all you want but they have more users than Twitter and healthy growth, to the point where they may eventually overtake Reddit.
Not only do they steal pictures in bad quality from other sites and write their website in such a way to always come out on top of search results, it also takes multiple seconds to close the webpage.
man I wish they'd keep pintrest out of google image search. yeah I know I can manually exclude their url from search but why is it there in the first place lol useless for finding reference material
My wife uses Pinterest any time she needs a list with pictures - things like recipes (organized by type - dinner meals, breakfasts, cakes, etc), outfit/clothing ideas, inspiration for projects around the house, etc. I've got lists in Google Keep and links in Pinboard.in but she's a very visual thinker and prefers having pictures.
I set up https://github.com/pinry/pinry for myself. Sadly there is no way I'll ever be and to get my wife to switch. A big part of the draw of Pinterest for her is that she can quickly pull in links from other people's Pinterest boards.