See slide 7 for an example of an unpersonalised wall-of-text "feed" ... with absolutely no ad placement:

https://d1sve9khgp0cw0.cloudfront.net/wp-content/uploads/201...

For people who claimed to be building intentional communities, it's no wonder they failed: these hippies seem to have had absolutely no clue about what any 21st century child could tell you are the very fundamentals of community building!