One thing people are missing on the discussion of link previews for Mastodon is they aren't always an image + title. oEmbed scripts are also downloaded to Mastodon, not just the image and title.
3rd party apps mostly ignore these embeds which is a shame in my opinion. If you use the official Mastodon app or web UI, you will see them. Here's an example of a fun one (View this post on the official Mastodon App or website to see it)
