There's a flaw in the apache software that mostly Minecraft servers use that will easily allow a hacker to take over the entire server(s)! It's all over the net! Here's some info on it:
https://www.techradar.com/news/serious-security-vulnerability-affects-minecraft-icloud-steam-and-pretty-much-the-whole-of-the-internet
https://www.bbc.com/news/technology-36168860
Even if you don't use Minecraft it would be best to make sure your apache is updated!!!
Once upon a time I did use Steam for some games that were of interest to me, but that was a long time back.
I still use it now and again when I get bored and want to play some games. I've still got a ton of them. LOL