Yes, you have a great point Brian. Those in-line pre-amps never worked for me with FTA satellite. But with ADS-B signals it made quite a difference. ADS-B is on 1090 MHz. Was able to almost double the miles I could track planes in the area.
By the way, for those living in places where an outdoor antenna isn't allowed, you can build small VHF/UHF Yagis with a lot of gain, and turn them by hand inside your shack. I call it the arm-strong method. Hi Hi.