R3781) TH 15 | Lvl xp 142 | BK 52 AQ 61 GW 47 RC 26 | BM 30 | GEMS 2516 | Heroes Skins 6 | Name change 1000 GEMS | SCID

Payment fee is collected to pay for service related to the product, which is a standard practice in eCommerce and other industries.

In detail, it is applied to cover services rendered to the consumer as well as administrative or processing costs, such as payment processing fee and 24/7 customer support.