All of those RXs are knock offs and not true Spektrum RXs. I guess the first clue is the spelling, Spectrum instead of Spektrum.
I like this disclaimer they have regarding the RX
"Targethobby disclaims all support and warranty with regards, but not able to tell it is an original receiver or not"
and this too
"Targethobby will not be liable for damages arising products included on this site"
And I got a good laugh out of this statement
"When using this receiver, try to fit the satellite receiver outside plane or helicopter body or canopy, to avoid accidental signal lost"
A true Spektrum satellite doesn't require being located outside of the fuselage in order to receive a signal.