Steam is bad for some of us PC gamers because we like to have OPTIONS where we purchase the PC versions of video games. This is why some of us PC gamers love gog.com very much because all of the PC versions of video games that gog.com sells are 100% Digital Rights Management (DRM) free and GoG Galaxy is also OPTIONAL to use.
GoG Galaxy is a Steam competitor while gog.com also keeps it optional. PC versions of video games sold on Steam that use Steamworks you cannot get rid of Steam. With GoG Galaxy you can just get rid of the GoG Galaxy client if you don't want to use GoG Galaxy and still continue to play the video game you purchased.
Also gog.com has a lot of sales for video games as well, maybe not as many as Steam or daily flash deals like Steam does, but gog.com is coming up with sales. They even made their own weird sales like the Fall Insomnia sales, etc.