Sales are everywhere. Sale on shoes, bags, shirts, gadgets and everything. Malls and shops use this technique to attract buyers, but you know what? Do you think you've been discounted a higher price than ordinary? No. Instead of saving 20%, you spend 80% on things you dont really need. This is not economical and most of us are easily lured to it. This is what i hate about people. When there's useless trending items on sale, they buy immediately even on credit cards but if bitcoin drops, they talk negative about it. Normal mindset wants to get temporary attention. Not permanent comfort.
When I see malls posting "sale up to 50% off" my first thought is what are they up to now. One strategy that I noticed with Malls going on sale here in the Philippines is before they announce the sale, they will jack up the price to up to 30% and put a price tag on it, then a week later they will announce the sale and put a yellow tag with a discounted price. Also, if its a food that is on sale and in bulk, try to look at the expiration date.