A platform-level daily row cap can be set per installation. When the rows you are exporting plus everything your account exported in the last 24 hours would exceed the cap, the download is refused with "This export would pass the daily limit of N rows for your account. It has been recorded and the platform operator notified. Contact [email protected] if you need the limit raised." The attempt is still logged (flagged over cap, shown as refused). By default there is no cap. Separate alert thresholds (single export size, daily total, bursts of several exports within ten minutes, exports outside working hours) only send notifications; they never block.