My point seems to be missed... You can choose the Aviation 1 plan for InReach and pay quite close to the same as you do for Spot's contract. You then have a vastly better gadget that is producing more interesting and useful data points every 10 minutes and provides 2-way arbitrary messaging and it does not cost more for the service contract.

The idea that InReach costs more is only for guys like Sean that want the high sampling rate. You don't have to set a high sampling rate -- you can set it at 10 minutes. It seems to me that there's actually no rationale for Spot except that you may want to keep it until your Spot contract runs out.. And, be careful on that sco Spot is setup to automatically renew unless you notify.

There's a one time cost to upgrade, of course, but that doesn't count.