http://theheadoffran.blogspot.com.es/2016/10/curiosities-about-steam-sales.html
The developer talks about offers in Steam and gives some data, also do not miss the other posts where the developer talk about fake youtubers asking Steam keys to the developers.
Develop games in your browser. Powerful, performant & highly capable.
Good read. The G2A and "fake YouTuber" articles are also worth reading, if you have games on Steam.
Sooo much effort to steal a key to a game that will most likely end up being a few dollars on a sale at some point.
You have to wonder if they don't enjoy the social hacking more than the actual game.