"they provide the service for free and so they can use ads" sorry but that statement is pure ****.
The only reason they provide the service is due to how they've coded the software.
TBH I'd rather my sling box didn't need to talk to the slimgmedia servers, being non US based the extra function that they've provided is next to useless.
I've spent a lot of money on the device, the iPad and iPhone app and they now try and gouge more money out of me by imposing paid ads.
I wonder what would happen if one of these paid adds spread a virus !