Hi Luis,
Thanks for your email! It sounds like you're going to have a fun shopping day with your parents. I usually do big shopping with my parents once a month. We don't really take part in promotions often, but sometimes we look out for them if there's something we really need. Promotions help stores by attracting more customers and encouraging them to buy more, especially with incentives like stickers.
Hope you find some great deals!
Best,
Russian_friend