[xdude]

I don't know, but i think if you have a website you need to give them a link regardless it's not in the sponsored severed. I remember Admin asking me about the link when my vps had no Web Server running. Putting it in signature is just an extra. But I think @Dynamo should clear this.

Personally I don't think Signature link has much use for the sponsor. They have their links in forum already so what they might like is an outside unique back-link. They are paying at least couple of usd for giving us each vps for free so I think its fair enough.