Panadvert announces its cooperation with Caldera Collection Hotels. Owned by the Patiniotis family, the Caldera Collection includes Volcano View, Petit Palace, Celestia Grand. In addition to other services, Panadvert suggested two innovative ideas: a customer loyalty program with “Resorts of Mykonos” and a charity program wherein a percentage from bookings made via the website was donated to the “Smile of the Child” foundation.