Blocked On Reddit from /r/carvana

I'm not certain whom runs /r/Carvana on reddit, but I suspect they might work for the big C.

I posted a comment to someone's comment about having bought a vehicle from them, saying that they should bring that vehicle to an independent mechanic to have it fully looked at, as the issues with my truck took a while to show up, and they continue to say it's not their fault.

I was almost immediately blocked from posting in that subreddit.

What's wrong with good advice?