Yes, it may take a while though.. lucky users get to win on their first days, for others it may take some months.. are you lucky? =P
in the forum you'll find giveaways with higher winning chances :) and there are also groups that can help you win; for example, Unlucky7 (you cannot join it right now, but you can once you have given 7 games away, which is going to be tomorrow, looking at your profile) :)

It used to run only on ads, but recently they added partnerships with bundle sites like Humble Bundle, and also started a Patreon for those that want to donate something :)

I see you're french; I don't speak french but if you have problems/questions, just ask in the forum.. some other french users will surely come to help you! ^_^