I have had a really bad experience with this company.
I have ordered key for two games here a long time ago, I even paid for buyer protection.
After my purchase I got a message that those games were added to my Kinguin Game Library where I thought they where safe since they never informed that any risk of the keys getting invalid existed - that's what I had paid extra buyer protection for.
Now, after a long time struggling with a disease I am getting slowly back into life and so also into gaming - but those keys I bought don't work and kinguin refuses to replace them - despite buyer protection, despite not having properly informed that any risk existed with that purchase.
I did provide any information they wanted but they say they can't clear it up and therefore wouldn't replace the keys... well, thanks for nothing, I learned that I'm not the only one experiencing this with the "buyer protection". Their position is: "The Buyer Protection which you purchased does not guarantee you that you will recieve the replacement or refund." - well they should tell you *before* you buy!
With that slap into my face I can only advise to choose one of the attractive alternatives when buying games on the net.