I can’t comment on that service Joe as it is different to mine. However, Allen VK3HRA runs a satellite service in VK for me.
Allen wrote the software that uses an old Android phone to handle the SMS and it forwards the message via its Wifi connection to the internet and to me. The phone needs a valid SIM so it can receieve messages.
Check with Allen if his software is available for you to use. If so, I’ll be happy to let you run a “server” that forwards SMS received in OE to me.