Ever heard about dark pattern in eCommerce? No? Then you should definitely continue reading. Dark pattern are used in eCommerce since years and are well common. Even though some people judge them, many big brands like booking.com or amazon.com uses them. Some examples your might have seen during your own shopping experience:
Sale Countdown Timer (encourage customers to buy quickly before sale ends)
Sneak into Basket (add additional products to cart when a specific product has been added to cart)
12 People currently view this product (scare customers that stock might be empty soon)
Save 40% (encourage customers to buy quickly before sale ends)
Reserved Cart (save a users cart for a certain time to rush the selling)
Set products automatically on sale at a recurring time (offer of the day pages)
Only 3 / 100 Products left on Stock (motivate customers to purchase quickly)
Sale Quantity (remove sale price after 100 purchases)