Just for fun. I track card game separately from board games (I did a board game top 100 back in September). I also don't include "LCG" games, like Game of Thrones in the card game category, so they're not here. For this list, I stripped out expansions (spin-offs were alright). Expansions are much more prominent in card games than any other department, but it makes for a boring list. You're also likely to see games that might not meet your personal criteria for a card game, like party games or even a war game or two that happens to be played with cards.
The list starts at the top left with number one. The top right would be number fifty-one.