A method and system disclosed dynamically throttling a rate or volume in time of a power user for avoiding throughput penalties imposed by SaaS vendors on a user group due to excessive Application Programming Interface (API) events from users in the group, monitoring API event rate for requests from the group, collectively, and from individual users of the user group to a SaaS vendor is disclosed. Also, identifying a power user as submitting API events in excess of a limit, and on behalf of the user, throttling the power user's rate of API events submissions, based on a configurable policy specific to the SaaS vendor managed by a proxy, to reduce the user's impact on the API event rate of the group at least when the group's API rate, overall, exceeds or approaches a SaaS imposed trigger of a throughput penalty on the group, thereby avoiding triggering of the throughput penalty by the SaaS.