To reduce the traffic if it's needed, it is possible to act on different parameters:
Limitation of requests in the Customer profile, tab web services, it is possible to set the limit for the maximum request per minute of the client.
In Customer Profile and tab web services, it's possible to upload a csv file with a hotel's set specific for the client.
For a better optimization, it is necessary to cooperate with the client. Specifically, the steps to follow are:
Ask the client competitiveness analysis (you may receive different requests but some other supplier has a better price than yours therefore he gets the sale)
Ask a file a mapped file product to verify that requests are sent to all and only the properties put available for that client
Ask traffic analiysis on their side: your client may have other clients to whom he resell your rates. Not all the clients have a good conversation rate therefore we can request to exclude those who only make queries without any bookings