Originally Posted by m4yadult

Fine, but I can´t see the relation to the canonical tag.



You are always on risk to lose SEO positions. It´s not a matter of accepting affiliates.



Using the canonical tag does not help so far. That tag simply cuts off the aff code from your URL. It does not prevent your affiliates using your keywords and get better SEO listings.



Your URL will never send any sales to a competitor. If I´m using my own site and URL with those metatags and keywords, the canonical tag won´t help.



I don´t think so. The tag only works on your own URL and cuts off the aff_id. So if I´m using metatgs and keywords for my own URL, you can´t stop me getting traffic for those keywords. The tag only works if I get your URL with my aff_id listed.

"Can this link tag be used to suggest a canonical URL on a completely different domain?
No. To migrate to a completely different domain, permanent (301) redirects are more appropriate. Google currently will take canonicalization suggestions into account across subdomains (or within a domain), but not across domains. So site owners can suggest www.example.com vs. example.com vs. help.example.com, but not example.com vs. example-widgets.com."