https://torrentfreak.com/how-laligas-anti-piracy-tools-led-to-two-more-pirate-iptv-arrests-220406/
Card sharing does not really envolve encrytion breaking, one person pays for everything and the card is cloned and used by each subscriber. Not really very common anymore.
Card sharing is still a thing in 2022? I moved to iptv when mine couldn't do HD for over a year because the encryption seemed to withstand efforts...