You need to keep your place until the end of your event. If you are in the top 25 and there is 1 hour left, if someone passes you in that last hour and you get knocked out of the top 25, you won't get the prize. Good luck.
Ok thank you for your help. I'm still having difficultly getting my prize from the pumpkin event. They reply to my ticket with an excus lol. Thanks.