You also get (with Delorme/Garmin) altitude, speed and heading as part of the tracking for those following you. With Spot, those following don't know if you are circling at 500 ft. AGL or cruising at 17.5 MSL. You also have the option of increasing your tracking interval to 5,2, or even 1 minute with InReach/Garmin. Finally there are enterprise pricing plans that allow for much more data and less texting, encouraging 1 minute tracking in the main flying months. This can be rolled down to $5 per month maintenance plans when not flying.

Sean