InReach receiving Preset Message from another InReach user free?

Hi all,

Prospective Garmin InReach user here. I have a friend who has an inReach. We split up on a recent snow-shoe expedition, and he got concerned when I didn't arrive back at the car by a certain time. If I had my own inReach device and sent his inReach device a Preset Message saying something like, "I'm fine! Enjoying the shoe'ing," would that count as one of his 10 included (or billable) messages on his Safety plan? Or would it be free?

The Garmin InReach Messaging FAQ says that sending Preset Messages is free for me, the sender... it doesn't describe what happens when the receiver is an inReach user...

Thanks!