Just to clarify, what I called "extra links" was actually raw code that had been posted to a prominent but empty field in the profile.
The "raw code" looked something like this:
url=http://www.mysite.coml]keyword[/url
url=http://www.mysite.coml]keyword[/url
url=http://www.mysite.coml]keyword[/url
Where I have typed "mysite" and "keyword" in the above example it had one of my actual URLS and Keywords.
I am pretty sure Google would still count them as links even though they are not clickable, so to Google's spider each profile would appear to have 7 links to my Site because it would read that code as well as the URLs in the Signature and the URL in the Homepage field.
Besides, you have to admit that to a forum moderator or visitor those profiles would look very spammy with those extra URLs in them, so I would expect most of them will end up being deleted.