Daren,
Hi..my original directions might not have been clear. If a user posts a direct link to a resource on another site (such as ezone, rcgroups, runryder, etc) that is allowed. If a guy says "see this thread on ....." and he links directly to it that is fine.
On the other hand a blanket promotion like go check out
www.whatever.com for info on that is not permitted if it is a competing board. In other words we encourage the use of direct links to specific threads, articles or resources on any service (even competing forums) as long as they are answers to specific questions. It is the blatant generic plugs that we discourage. Sometimes the plugs might be harmless but more often than not they are just shameless plugs so those are deemed to be unacceptable and thus removed.
If the posters above had links to a specific thread, article, review or whatever which was applicable to the thread topic here or question they could have stayed and it is my fault for not being clear enough on this with daren. Hopefully from now on it will be and everyone will understand how this works.