Did you click the link I posted?
Knowing this you still use G2A? I shouldn't need to buy protection in the case I don't get a working key. Imagine going to Walmart and picking up a switch game but then you get home and find the case empty. You go back to Walmart and they tell you "Sorry but all sales are final unless you buy our Walmart shield which will make it so we replace the product you didn't get that you paid for."
And then there's the misleading cancel screens.