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There aren't any restrictions hard-coded, but there's nothing preventing you from writing that logic in on your own.
Please let me know if you have any other questions.
What is Kinvey's policy towards malicious users using up my caps? Eg a user signs up for 10000 accounts and makes 1 API call on every one and thus accounting for 10000 Active Users or someone spams a bunch of push notifications, etc.