We understand that from a user's perspective, one might expect to be able to synchronize the same source contacts with as many destinations as desired for the same price.
We would like to enable this as a manufacturer. Unfortunately, due to technical and financial constraints, this is not feasible. When the same address book source is synchronized with multiple sync.blue® connections with different destinations, the technical resources required for it (server capacity, runtime, support effort, etc.) triple, which equates to three customers each with a single connection.
However, the current pricing model already takes into account the synchronization of many contacts: the price per contact decreases significantly with increasing contact quantity.