Venmo's "friend feed" I believe is perhaps the singular reason Venmo succeeded where others have failed. However, I don't totally get the point of the public f

Venmo's "friend feed" I believe is perhaps the singular reason Venmo succeeded where others have failed. However, I don't totally get the point of the public feed. The only thing I can think is that it showed new/light users that Venmo had a lot of activity and ideas for when to use Venmo (ie, if you saw a message from strangers "Payback for lunch" it would plant the seed to use Venmo for such).