The FAQ could be updated, for example … Aireon Space-Based ADS-B Flight Tracking - FlightAware … (and others) still refers to events in 2018 as being in the future.
In the last few days, this wording has been fixed.
The blurb about Aireon space-based ADS-B is effectively a year out of date.
See this page (at the very end) https://flightaware.com/about/datasources/