For me, this is for a specific niche of posts that my usual followers aren't interested in (I've tried!) *but* has an audience across platforms as a separate one. It's an alt for my hobbies, not my regular posts.I like PixelFed for this bc my profile is a gallery, it has features that are great for photos (ie. location, not always an option), and it's a helpful way to separate mindsets for a different kind of posting. Everyone doesn't have to do this, but it's great for my use case!