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One major benefit that they highlight is the SEO Advantage from getting a link in their directory. There are only two problems: The links to each site are redirects, and a nofollow tag is used for each link.
I've already had clients pay for inclusion. Is there any reason why I shouldn't ask for a refund for all of them at this point? The more important question, what's to keep this hosting company from being sued for falsely advertising the benefits of their paid directory inclusion?
You have statutory rights as a consumer and in most countries will be able to cancel within 7 days of making any purchase of the Internet. Check their terms and conditions of purchase, contact their customer service and keep all correspondence.
If you get no joy contact your credit card company and request a chargeback.