As some who does marketing and comms as my day job, I would say in marketing terms it's unlikely to make much if any difference to your bookings, to have random hosts from around the world, linking to each other's Instagram account.
Now if you got an eminent travel writer or blogger to do it, who has a target audience of the sort of travellers interested in staying in your location and your type of property....that would be a different matter 🙂