I think the cardsharing sticky is in the dreambox room as we didnt have lots of different sections for receivers back then. Maybe I should move it so people can find it easier?
Cardsharing isn't really about 'sharing' back with something. What it means is a single card shares it's ecm/encryption replies to many remotely located receivers. In other words, 1 card runs as many boxes as you can achieve.
Usually this means people just join and pay someone who already has this set up, or they create their own for privacy & security (or greed of profits).