【Solution】

The restriction period is set to determine the frequency of prize draws for fans. For example, if your scratch card campaign runs from September 1st to September 10th (10 days in total) with a draw count of 1, selecting "No Limit" for the restriction period means each fan can scratch once during these 10 days. If you choose "Daily" as the restriction period, it means each fan can scratch once per day within these 10 days.