Carc is usually my gateway intro game! It was the first one I brought to work when I formed a group two years ago. I think we are almost up to 50 unique titles I've taught. We have the odd repeat when time is tight but Carc hasn't made it back in a while. Part of it is I don't enjoy this as much at that count.
I am happy to say I created a new 'hard core' gamer from the group and it was the 1st game he bought. I think his collection is near 40 - so my job is done
Though I am always looking for new converts