I'm thinking Substation

When exiting the game it sometimes hangs while trying to update the Steam cloud as if it fails to send a notification that its done... don't have the problem with any of my other games

http://us2.factorio.com/assets//img/blog/fff-127-funny-stats.jpg

What these graphs mean? Without a legend it is hard to know. :(

pd: once again I updated my account because I knew that option would disappear.

Time across the bottom, in hours. Sales (in units?) on the left. Sharp drop-off ...