News comes via Microsoft’s official Games for Windows LIVE Facebook page that the PC Marketplace will be shutting down on August 22nd.
As part of the upcoming Xbox 360 system update, Microsoft Points will be retired, and the Xbox.com PC marketplace will be closed as of August 22, 2013. We encourage you to spend your Microsoft Points balance prior to this change. Although you will not be able to purchase new games, you can continue to enjoy previously purchased content by downloading them through the Games for Windows LIVE client software as usual.
The post contains a link to a FAQ that will explain some details of the shutdown, but the link isn’t working yet.
Microsoft launched Games For Windows LIVE in 2007, but it was highly unpopular with PC gamers on release because it required an Xbox Live Gold subscription to play in multiplayer games. This requirement was quickly removed, but the service never really recovered, and it was always lacking in features and sales that competitors like Steam offered with less technical issues.