The GraphQL Content API currently has a query complexity limit of 11000 for all queries. A few customers were temporarily excluded from this limitation based on the complexity of their prior queries sent to the API. Starting May 31, 2019, however, this exclusion will no longer apply to those free and on-demand customers who currently have exceptions. There’s plenty of time left until May 31, but please double check that all your queries fall under the 11000 limit so that your apps keep working smoothly.