Then this isn't the solution for them. You keep assuming this is an internet service when it's not. Internet protocols are massively inefficient and have latenc

Then this isn't the solution for them. You keep assuming this is an internet service when it's not. Internet protocols are massively inefficient and have latency constraints that would choke narrow channels while offering almost no utility. This will be a modified SMS service, not a not an IRC service. Don't like it? Go buy an actual satphone with a data plan.