mastodon.social is one of the many independent Mastodon servers you can use to participate in the fediverse.
The original server operated by the Mastodon gGmbH non-profit

Administered by:

Server stats:

336K
active users

Geoff 🏴󠁧󠁢󠁳󠁣󠁴󠁿

@rlmcneary2 @pluralistic There was a similar case with BT in the 2000s, they inserted their own adverts into web pages when serving them to UK customers. I noticed when they did it to my own site. They got a stern letter about copyright infringement, which it was, and swiftly dropped the idea.
The difference here is that the webpage is delivered directly to the user's machine, and the user then chooses how to modify the data.