I think that the anonymity provided by craigslist is something people value. Having strangers looking into your life after posting a for sale ad doesnt feel right.
"You’ll only see Ribbon listings from your Facebook friends or the pages you follow on the social network, which in theory cuts down the number of unwanted postings"
Which is what Facebook's Marketplace already emails me about; friends' and friends of friends' listings. Adding it to Pages whose primary intents are not sales seems like a great way to get unwanted spam.
Seems pretty pointless, when looking for a couch what is the point of restricting the market to your family and friends?
When I'm not looking for a couch why would I give a shit that my friends are selling one?
I don't need a payment gateway to deal with family and friends. Nor do I need two to four intermediaries taking a combined total of about 35-45% of the value of the transaction.
I don't even need one for CL, cash works perfect, easy, reliable, trusted, no middlemen.
On the other hand the digital goods selling looks stellar, if they integrate some kind of share incentive or other multipliers it would be phenomenal.
eg. Share and get 25% off, or Send another copy to a friend, two for 1 if you buy with a friend, etc.