If we already know you, or you participate in some of the same community-driven projects as we do, you're welcome to request shared use of the system. While you may use our nixnodes.net domain, we encourage people to use theirown.
If we don't know you and you wish to use our system, send us a request (including a short introduction) - a one time fee of 0.1 BTC is required to minimize the risk of abuse.
Under no circumstance will any sort of malicious use of the system (spam, soliciting, etc..) be tolerated. Abusers' accounts will be terminated with extreme prejudice.
You can find all relevant technical information here.