Might be interesting for Facebook to move from charging for ads to start getting their cut of successful sale. If they would crack this, there might be positive

Might be interesting for Facebook to move from charging for ads to start getting their cut of successful sale. If they would crack this, there might be positive loop effect. Getting to know if users actually purchased something would give FB more data, which would allow better targeting. Implementation of course is not trivial. One way to make this work would be for Facebook to run the platform where purchase and payment takes place, like Amazon Marketplace.