Hi Animats - Thanks for the technical analysis. We don't get any "kickback" or benefits from promoting services. In fact, we don't post specific referral codes or promo codes on the site. I created the site to track services I used in the past.
However, I understand the point you're trying to make. I'll definitely work on making it clear if a service is offering something for "free" and clarify the full terms of the wording.