Trojan malware that steals affiliate link money from anyone as long you go to the checkout and click on their pop up,

it also most of the time are very useless and don't help you save the most money and if they do they use their own promo code which is also not the best promo code they promised as you can find better codes by searching it manually online.

It also allows stores that partners with them to control percentage and what promo codes to be used on honey so you get a worst promo code intentionally

Full explanation video can be seen on "Exposing the Honey Influencer Scam" On Megalag channel