It might help to think of it like email. If you sign up with gmail, you have a gmail account. You don’t necessarily have a microsoft account but people @outlook.com can still send your @gmail.com account email and you can still read it no matter where it’s from
In a similar way, you have a kbin.social account. You don’t have a lemmy account but you can still see posts from people in lemmy.world
It might help to think of it like email. If you sign up with gmail, you have a gmail account. You don’t necessarily have a microsoft account but people @outlook.com can still send your @gmail.com account email and you can still read it no matter where it’s from
In a similar way, you have a kbin.social account. You don’t have a lemmy account but you can still see posts from people in lemmy.world