Pitch

Rather than fetching every link that comes in with a post, possibly causing a DDoS on a small target webserver, fetch the metadata on the sender side and attach it to the status object in some way.

Motivation

Even with the random delay, there's still a significant amount of load that can come from requests for page metadata for posts from users with lots of followers from different instances. Misleading metadata is a non-issue as it's already possible to create a redirect page with misleading information on it for Mastodon to consume.