As a (almost) client of Flightaware for FlightXml service, Im worried about this too. You (Flightaware) should work on make things more transparente and clear for your clients (already ones, recent and future). You have to give us tools, information clear to not let give space to any suspicions on your services.
Here is a post of mine regarding the delayed information displayed regarding requests history made to your services, and Im still waiting response.
Please consider.