Herbie
Rendezvous Conspirator
A question I'd raise about SPOT is what would they do if they are in receipt of an emergency message from a device with an account that is delinquent. Recognize that the account may be delinquent through no fault of your own - check lost in the mail, credit card on file for auto renewal expired, or any number of other possible administrative foul ups. Just something to consider.
According to Doug Ritter over at Equipped to Survive, one of the entities MOST active in advocacy for PLBs and the like, there is currently no REQUIREMENT that SPOT honor or respond to the alert. He suspects that this may eventually come via Goverment fiat the same way that cellphone companies are required to allow 911 calls even on a phone with no service plan, etc., but currently there's no "rule".
SPOT is probably reluctant to state outright that they would honor the alert, because then that provides a real incentive for people who only want the SPOT for emergency service to allow their plans to lapse.
What would eventually force everyone's hand is IF there was ever an instance when they did NOT take action and someone suffered additional injury or death due to the lack of/delayed response.