All servers for Fediverse softwares (Mastodon, Peertube, Pixelfed, etc.) are managed by people that do it only to offer an entry to the Fediverse.
These services won't track you, there is no advertisings and are fully respectful with your privacy.
You can help your favorite instance to keep working with a donation that will contribute to server charges.
They also need your help :)
@fedilab I agree, help is something they need.
There are however servers that are indexing the posts (public ones) and selling it with commercial companies.
A friendly instance about tech, apps and for having fun.