The US government has really shaken my trust in services like these (which I guess is their ultimate goal). With the risk that these "secure devices" type sellers are fronts I think it's best practice for anyone wanting a de-googeled device to just buy one of these phones in store with cash and then load the custom OS themselves, it requires the level of technical knowledge you'd need to even know you'd want something like this in the first place so anyone that wants it can easily do it.
Also I find it ironic that this website is full of Google requests, we've got YouTube, google translate, gstatic content, google recaptcha, googleapis, and google fonts requests all just on the landing page alone.
Doesn't help that it's sending data to Facebook either.