One is Ello. No ads. Their manifesto is here:
Another site is Tsu. Here's their version:
We believe in quality content, real ownership, and the value of one's own network.
- As a free social platform, we recognize members for their likeness, image and content by sharing earned revenues.
- Create content, interact with your community, and invite your friends and followers to join what is now your personal network.
- As a content creator, you'll earn fair value for all the social things you normally do.