When a user visits a partner merchant’s website, they may be informed of the possibility of receiving cashback through a cashback bar. This bar is installed in their browser and allows them to indicate their intention to make a purchase through the bar’s publisher (cashbacker) with a single click, enabling them to receive a percentage of their purchase in their cashback balance. Simultaneously, the cashbacker, as a member of the merchant’s program, earns a commission. However, some cashback bars are controversial because they can overwrite the cookies of other affiliates without the user having explicitly chosen to use only the cashbacker’s program. Furthermore, some merchant publishers (affiliate networks) refuse affiliates from cashback bars, and affiliate platforms may have specific policies on this matter. A well-known example of a cashback bar is iGraal.