Found the real reason they are stopping, it is for legal reasons as they are being sued by Koei Tecmo. Found this on reddit:
Koei Tecmo released game RotK 13. 3DM published crack, received cease-and-desist letter from Koei Tecmo. 3DM had to comply and remove it. 3DM community angered by this. They see this as another oppression by the buy-it gamers. So to get back at their greatest enemy, they started a mass petition against steam on the website of the government censor authority. Now, I have to remind you that China is a country with censorship. As ridiculous as it sounds, since steam did not enter Chinese market by sending games it sells through the censoring authority, it's as legal in China as the pirated games 3DM distributes. Such a petition may actually get steam banned in China. 3DM obviously doesn't benefit from any of this. The buy-it gamers could retaliate and get 3DM banned too. The 3DM community would simply find another forum, but 3DM might lose their business. Now, going legal, at least distant itself from the trouble makers suddenly becomes a very appealing strategy.
Originally Posted by andrews2547
There isn't really all that much risk anymore with Steam
refunds. If the $60 game turns out to be not as good as you thought, doesn't work properly because it's unoptimized, doesn't work on your computer because your computer is too weak, etc. as long as you have less than 2 hours gameplay time and you bought it 14 days ago or sooner, you can get a full refund, no matter what the issue is. The only real risk with buying $60 games from Steam these days is going over your data cap if you have one.
I have a very hard time entrusting Steam or any client that requires a program to run my purchased games. Backstory: About 7~8 years ago had a member on this site that was offering to gift games in chat due to them getting a "supposed" big tax refund and was feeling generous. So I took the offer and they gifted me a couple games, everything was good for about a week. Then I found I couldn't log into my account and couldn't change my password. I contacted steam support about it and went through all of the steps of getting my account unlocked, but to no avail. I found out that the person that gifted the games to me had used stolen credit cards to purchase the games and because of that I lost a steam account with ~$500 worth of games attached to it. So yeah I have a very hard time trusting Steam at all and will not spend anymore than $10 for any game that requires it. Main reason I only use gog.com to purchase games anymore.