They are one of the main partners of Marvel Comics in Europe. They translate & deliver most Marvel Comics in newsstands in Italy & France (and, probably other countries as well).
About the covers … Everything is possible. Olivier Coipel is French and Gabriele Dell'Otto is Italian. So, it is highly possible that, once in a while, they (or other pencillers) are paid to make original drawings for the European market.
From time to time, they are also invited at the Angoulême International Comics Festival (French: Festival international de la bande dessinée d'Angoulême).