Hi Gul, We currently do not enforce a data size limit for Whispersync traffic that is not considered abuse or misuse. For a given customer/game combination, we plan to limit the amount of data stored in the cloud to under 1 MB. We do not currently expose service storage size, but overhead is typically under 50 Bytes per element allowing several thousand elements to be stored in the cloud. The length of key names and String values would directly count towards this limit, so please take into consideration. There is no artificial limit on local storage size. As far as rate of access, passive synchronization is currently limited to once in 30 seconds, and active synchronization is limited to once in 10 seconds.