I think I would be fine with a positive enumeration. Some ideas for serving content:
- purely random
- sponsored but without user tracking (like old school TV ads)
- sponsored for user selected geographical area feed
- sponsored for user current location geographical area feed
- follow "friends" or influencers
- purely timeline
- discussion boards
- timeline (IRC like)
- threaded
- user votes (not magic platform votes)
- follow keywords
So Hacker News wouldn't be allowed?
I think it should be, maybe I'm missing some aspect, I just cooked up a simple list of rules on the spot, sheesh :-D
Edit: huh, I'm probably stupid, but can you explain more?
HN uses magical platform votes.
And it should be transparent about it. When Dan uses a magic lever, it should be visible.
Would Facebook be okay if all the Nazi propaganda posts were tagged "Facebook boosted this post"?