As of December 2021, no, there are none.
But I dug deeper to do some research on the fees that are on g2a marketplace.
I checked g2a’s support hub for sellers for more info. As it turns out, the fees apply to sellers.
So, there’s a general commission of 10.8% €0.35 that is already included in the price.
There are also some tiny fees for either creating, updating and reposting an offer. So, posting an offer, changing the price, adding more keys to an offer and making changes to preorders costs €0.15 (in case of adding more keys, it’s €0.15 for each 10 items added).
From what I saw, there are also some fees for selling gift and prepaid cards, preorders and software (especially Microsoft’s).
There are also some fees for money withdrawal and currency exchanges. And there’s VAT, of course, which is added to the base price and included in the final price of a game or whatever it is that you want to buy on g2a.
The other fees that I found include the order fee. It’s already included in the base price, it’s not added when you check out, and it only applies to digital products.
And there is the developer fee. Turns out it applies when a particular developer joins the G2A Direct program, they’ll get 10% of each sale of their products by someone else, which is a surprise, but a welcome one.
Aside from that, I don’t see anything else that would come up in your cart when you check out or after you purchase something. The price you see during checkout is final. There’s also G2A Plus that you can join for some more discounts, but that’s entirely optional.