I'll be interested to see how SpaceX tries to get the word out to rural Canadians once it launches. None of Elon's current companies have had to do any traditional marketing yet, but I suspect that they'll have to for this.
You can still reach them with internet marketing, people who live in rural Canada still use social media. In many rural areas there will be kind of a catch all local business that springs up and resells cable, dsl, dialup, landline, cell or whatever services are available in the community (along with offering computer and phone repair or whatever). If it were me I would reach out to these people and let them do their own local marketing, in addition to the normal Elon strategy.