No, this is nothing like a targeted ad. One part of the service "favorites" tweets that you may never have seen or read. It would be more like Facebook selling

No, this is nothing like a targeted ad. One part of the service "favorites" tweets that you may never have seen or read. It would be more like Facebook selling a service that likes popular user's posts. It's like Amazon writing a useful review for a product you never bought. Twitter would look horrible by partnering with an automated service of any sort.