In addition to this little, but effective trick, I’ll advise you not just to create some redirecting page like this http://tripperish.com/test_product/redirect.html. In Firefox for example, it is easy to any selfish-computer-familiar user just to right click on redirection link and “Save Link As…”. Then all your hardwork to mask an hide (& seek ) the aff-link is vain.

That I advise you is to create separate directory for each product and place your redirection link in index (default) file, but when you point to it just point to product directory (let browser to seek himself for redirection link ) like this: http://tripperish.com/test_product. If you try to “Save Link As…” you’ll save just the page that is point of masking/redirection…, but wait (even now I won’t to promote anything to you ).

The mentioned trick isn’t work in IE, even you are masked aff-link in index file. Right click and “Save Target As…” will expose your aff-link unfortunately .

That I prefer PHP redirection like this:

placed again in index file (index.php) on any product directory. This will protect redirection content to be exposed, if someone try to “Save Link As…” or “Save Target As”. Against search engines you just have to ban redirection link in robots.txt file on your site:
User-agent: *
Disallow: /anyproduct/index.php