I have Twitter, reels alt accounts with a few thousand followers each where I make memes, mostly Indian content. I also have an alt LinkedIn account, I use this to stalk people at work who I think may have interesting career progressions. I don't add coworkers on my personal LinkedIn, I added some of them on this alt account to follow updates.
FB, Reddit, YouTube. Not bothering with Twitter anymore, it’s nothing but garbage.
You can just tweak the privacy settings on linked on where the person you are looking at can't see who looked at their profile. An alt account isn't really required.
I have alt accounts but it’s just because I know my friends/family don’t want to be spammed with cat posts. 1 page for the cat, 1 for me.
Does Reddit count
Nope It's almost too common nowadays
Okkk. Else I have 3 Reddit accounts. Each have their own purpose.