I've been using #Mastodon for a while now, coming up two years, I think. I switched instance late last year. But I have to be honest, I don't fully understand why I see the posts I do. Timelines, I get that. All good - home, local, etc. No problem.
But why is it that if I view someone's profile, on a different instance, I'm told they've made, for example, 69 posts but I only see three, even if I look at Posts & Replies.
Any link to explanations is fine!