Valve has announced the launch of new Steam Stores that are completed managed by developers. Currently the Stores feature is only implemented in Rust but is expected to rollout further afield in the coming weeks.
The new Steam Stores offer a similar environment to those of the Steam Community Market although the new stores are managed by developers who are then able to set their own prices.
Valve explains more to the Steam Dev Community Group :
This new Item Store is designed to make it easy for developers to establish an in-game economy or to just sell individual cosmetic items, keys, or consumables.
And, it’s designed to easily integrate with a curated Workshop (similar to Team Fortress 2) so you can accept user-made items, use that data to create item definitions and prices in the Steam Inventory Service, and set those items for sale via the Item Store.
Steam takes care of the checkout process, splitting payments to Workshop authors as appropriate, and adding the items to users’ inventories. Your game then just needs to be able to call the Workshop to download item content in the right circumstances for your game.
At the current time some details about how they function are still to be explained by Valve. As soon as more information is made available regarding, how the micro-transactions are split between developers and Valve we will keep you updated as always. But in the mean time for more information on the new Steam Stores jump over to the Valve Steam website.