OTAs enquire the GDS (Global Distribution System) for the Room availability and Available Rooms at the Hotel. Hotels update their inventory in terms of room booking rate & available rooms for a certain period of time via CRS (Central Reservation system) which further reflect in GDS.
Due to technological layers & current technical architecture limitation
the listing of the Price and Rooms are not the real time as it supposed to be on OTAs, which may give an impression that OTAs are selling rooms
at a inconsistent price, which can alienate the customer experience.