As posted on krita.org, KO GmbH is handing over all its involvement with Krita to the Krita Foundation.
This includes Krita on Steam. The Krita Foundation will continue making new releases of Krita on Steam: the main difference is that proceeds from sales will now go directly to the Foundation, instead of to KO GmbH.
Valve has worked with us to transfer the application from KO GmbH to the Krita Foundation and everyone who bought Krita on Steam will continue to receive updates.
Boudewijn Rempt
Founder, Krita Foundation