Last year I bought a game from them, and after the payment they requested my passport as proof of (I don't know) something. I didn't send any personal data. This year, I bought again a game and after the payment was made, even if was 4-5 eur product, they are requesting again to send "as verification" photos from the passport and a picture of your bank account.
This is unacceptable.
Is just a scam.
Take care of your money and privacy.