 <p>Good questions. </p> <p>The data limit is based on the size of data sent to the Power BI service. If you send us a workbook the size of the workbook is counted against your quota. If you send us data rows, the size of the uncompressed data rows is counted against your quota. Our service is in preview right now so there might be tweaks to the above as we move forward. You can keep up to date on the latest guidelines by referring to this page: <a href="https://www.powerbi.com/dashboards/pricing/" rel="nofollow">https://www.powerbi.com/dashboards/pricing/</a> </p> <p>The limits apply to any caller of the Power BI API. The details on the limits are listed at the bottom of this article: <a href="https://msdn.microsoft.com/en-US/library/dn950053.aspx" rel="nofollow">https://msdn.microsoft.com/en-US/library/dn950053.aspx</a>. The usage is additive in that if you posted 5K rows, then you'd be able to post an addition 5K rows within the hour. </p> <p>Appreciate your using Power BI.</p> <p>Lukasz P.</p> <p>Power BI Team, Microsoft</p> <p>Get started using Power BI APIs on the Power BI Developer Center - <a href="http://dev.powerbi.com" rel="nofollow">http://dev.powerbi.com</a>. Keep up to date with the Power BI Developer Blog - <a href="http://blogs.msdn.com/b/powerbidev/" rel="nofollow">http://blogs.msdn.com/b/powerbidev/</a>.</p>