This dude is 100% correct and I have no idea why people are downvoting him. Sales make people more likely to buy a product due to being limited. Limited time sales work better than lowering prices in the long term.
It’s why indie games do stuff like release their new games with time-limited 10% off discounts.
It’s a bit complex. IIRC He sold the rights of making games to a tiny indie company and then CDProjekt bought the company and made the much elaborate Witcher 1.
Paying less is good. I love sales, but they are still a psychological manipulation to get you to spend more money than you normally would.