Fireproof has published an infographic with some interesting statistics, including how many people upgraded to their paid games
In addition two separate people apparently wrote to Fireproof to complain about innaccuracies with how clocks work in their games.
Besides that it seems that The Room and The Room Two have been downloaded a total of 9.73 million times, and actually paid for 5.44 million times, as of March 7 2014. And The Room Two cost almost 2.5 times as much money to make as The Room did. Finally the vast majority of players of Fireproof's games come from iOS—though keep in mind that when The Room came out Android gaming was not what it is today.
You can blow the graphic up and zoom in on Fireproof's site.