• don’t do anything illegal on your VPS, or you will be expelled
• we don’t like seeing Tor, exit nodes are forbidden
• if your VPS becomes the target of a DDoS attack more than twice, you can be expelled
  • this primarily concerns game servers, we basically haven’t recorded problems anywhere else
• in essence, we don’t mind game servers but we have had a number of bad experiences with them
  • special conditions apply to game servers, see the information about assigning processor cores

Other than that, the way you use your VPS is up to you and is not subject to any regulations.