FWIW, “sleepfoundation.org” is owned by Sleep Doctor, and is essentially a sales funnel to sell CPAP machines and other sleep-related therapy.
Nothing wrong with that, but it’s at least a little shady to present themselves this way.
A Sleep Doctor brand, SleepFoundation.org was acquired from the National Sleep Foundation in 2019 and is no longer affiliated with the non-profit organization. The National Sleep Foundation is an independent, 501(c)(3) based in Washington, D.C.