Since signatures contribute to google results, spam linkbacks in signatures need to be prevented too. Hence rel='nofollow' should apply to signatures too. In this way, a person who registers and doesn't post, yet inserts links in their signatures will not benefit at the end of the day. This is why I remove sig links from spammers even after I've banned them.
Well that's my understanding anyway.
And you should read the promotion forum rules before posting - we don't allow website advertising.
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