Soo.... For example, Half-Life 2 has 8 cards in total. You can only get 4 cards max. How are you supposed to collect all 8 cards? You'll never end up with 8 cards unless you buy the other 4 from the marketplace right? If you just trade the 4 you have, you'll end up with 4 cards again.
Unless they reset the drops, which right now, doesn't seem to be happening soon.
Am I understanding this right?
My understanding is: This is thought out as a social thing. You should trade for you missing cards with cards from another game. You can pay to get everything, but it's not meant for that. A few cards for each series and there will be many series, if this is a success. So my guess is: 3 cards of series 1 and 5 of series 2 will also be able to craft a badge.