The auction servers are not really that different from the others. You get the same support. Every few years I hop onto a new auction server when it's cheaper than my current one. Never had any problems. When a HDD dies I get a new one as quickly as with the normal dedicated servers.
What you do with it is up to you. I run most of my services on bare metal. I did some virtualisation years ago but didn't see any benefits. I have one or two services running through Docker. That might go up with time, as it seems to be the easiest way to get something up with the optimal configuration.