Who will get more benefits?

Hello result7, I think the company who runs the contest will get the most. Normally, when you want to join a contest, they will ask for a proof of purchase. You tend to buy the product as many as you could, so that you can join the contest and submit as many as you wish to win the grand prize. I think you lose more when you decide to join it unless you become the grand prize winner at the end of the contest period