A guest who booked through an OTA belongs to them. A guest whose email you hold belongs to you — someone you can invite back directly, and keep the commission.
Contacts arrive on their own — a guest registering to unlock their entry code, saving their email in the guidebook, anyone you message, or your own import. Tag them into segments and export any group as a CSV for a mail-out.
Every QuietStay guidebook includes this, and the rest — one link, about 5 minutes. List on Offer2Stay and it costs even less.