webdevfv - 10:16 am on Dec 19, 2011 (gmt 0)
The site-wide redirects are being inserted by wordpress and operated by viglink.com
I have now found out that Wordpress does have this in its terms and conditions and sometimes operates this referral type thing on sites - but not all sites.
Ok, I have not got a big problem with them inserting some links but the way it was done, I thought the site was hacked. It was so bizarre that the links were referred to a signup for an affiliate program.
The blog has now been moved. So they've lost out by implementing such a ridiculous scheme.
Thanks for all your help. Hope this will also help anyone else who has a similar issue in future.