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Lets say a company (provider.com) offers a whitelabel solution which enables each client to have all of the content on their own domain (product.client.com), with no branding by the content provider. Now lets say that client.com is a site with a lot of authority, and to promote the launch of product.client.com, they put a lot of links from their main site to the subdomain. This can be very valuable link juice, and provider.com would like to be able to take advantage. The problem is, that client.com wouldn't like it if provider.com put in links on their whitelabel site. Suppose the following: All pages on product.client.com start to have a rel="canonical" link to themselves, with a get variable (e.g. product.client.com/page.htm -> product.client.com/page.html?show_extra_link=true) When the page is visited with the extra get parameter "show_extra_link" a link appears in the footer that points to provider.com My question is, would this have the same effect for provider.com as placing a link on the non-canonical version of the pages on the whitelabel site would?