Based from the
Basic Usage section of the RateLimiter Extension, AdWordsServicesWithRateLimiter object could be used like a normal AdWordsServices object and it would automatically handle rate limit errors. Having said that, technically, all supported API services, such as CustomerService and ManagedCustomerService, that could be invoked using the AdWordsServices should also be supported via the AdWordsServicesWithRateLimiter object.
Also, no restrictions or limitations specified for the RateLimiter Extension as per
blog post.
However, your queries are more specific to the RateLimiter Extension usage than with the AdWords API. It would be best that you double check with the
Client Library team as they are more equipped to answer you accurately.
Regards,
Ivan
AdWords API Team