In a recent interview with Venture Beat, Regie Fils-Aime produced this nugget: We don’t believe used games are in the best interest of the consumer. We have products that consumers want to hold onto. [...] Used books have never taken off. You don’t see businesses selling used music CDs or used DVDs. I understand the [...]
A shoutout is a way of letting people know of a game you want them to play.
Just pick an audience, or yourself, and it'll end up in their incoming play queue.