Whenever I see things like "x people viewing this product", "only x items left", "buy 1 get x free/discount", "limited time offer" etc it raises a massive red f

Whenever I see things like "x people viewing this product", "only x items left", "buy 1 get x free/discount", "limited time offer" etc it raises a massive red flag for me not just about the product but also about the company. But unfortunately good companies with good products also sometime get sucked into this marketing ploys.