Privacy policies usually end up with some sort of disclaimer saying, "... of course, who knows what our affiliates are up to." Hastings and Dancing with Lawyers have only one "affiliate" Paypal, the company that actually processes the credit card orders. We checked them out fairly thoroughly before deciding to use their service, and we’re fairly confident that they don’t sell or share information either. We have no affiliation whatsoever with any of the Web data-gathering companies.
Spamming: We never have, and we don’t have any expectation of starting now. At some time we may start a mailing list announcing new guides; if so, it will have an easy opt-out choice.