"Websites advertised in my signature are not endorsed by me."
By putting them into your signature that would be viewed as endorsing. Especially if you were paid to do so.
That's the point of the notice. I tell others that I provide exposure to rather than advertise the service/website, because I use it/love it/etc.
Side note: You still playing EVE? If so shoot me a PM, I would be interested in networking on that game.
I haven't played EVE, although the stories that come out of it are rather interesting to read. Let's stay on topic though.