I have a Twitter account, am logged out of it, but when I visit Twitter links, I can only see the post linked, but not any replies, unless I log in. Sometimes

I have a Twitter account, am logged out of it, but when I visit Twitter links, I can only see the post linked, but not any replies, unless I log in. Sometimes I can't even see the linked post without logging in. Unsurprisingly, people have different experiences with sites like these that really want you to log in, but will sometimes allow you to view some content without logging in, as a way to entice you.