Facebook, like craigslist, has a history of extreme prejudice against any form of automation or scraping of its site. I think that your suggestion about ads is

Facebook, like craigslist, has a history of extreme prejudice against any form of automation or scraping of its site. I think that your suggestion about ads is correct. Suppose one of these alternate interfaces took over a large chunk of the market. How would Facebook present any advertisement to these users? They'd have to go the twitter route and insert ads directly into feeds.