Media Sponge is a mission acquired though and for Mitch Benjamin. Mitch is an avid media consumer; he watches and reads a lot of entertainment. Due to circumstances leaving him at Cydonia he invests in entertainment for himself and his friends.
Media Sponge is a 30 mission total line of fetch quests given by Mitch to retrieve first editions of sci fi novels. They vary from multiple systems and locations in the galaxy. Each mission will accompany a possible Persuasion check upon delivery.
Deliveries of retrieved novels will yield an increasing amount of credits as you progress through the 30. There is no 'final reward' for completing all 30.
This is an easy way to lvl up persuasion.