One off incidents don't reflect evidence of increasing censorship. There is little to no evidence that this IS censorship and not an attempt to mitigate misinformation that has gone awry.

Some level of moderation is important on this and all user contributed platforms.

In my experience Steam has been a very responsible custodian of it's community. And benefits just as much as users from negative reviews that help it decide what to suggest to users.

What other examples do you have of bad censorship from Steam?