31 is simple, and you only need a standard deck of cards.

i learned about it because i noticed my profile has -1 reputation. i didn’t even know this existed. I agree with others, karma on reddit was stupid and people used low karma as a way to gatekeep subs. you couldn’t post until you have 100 karma, that sort of thing. It’s bad for business in my opinion.

Shuffle them in smaller stacks then cut each and stack them differently and shuffle again. Repeat a few times.

yes it will because it means they each need to monitor 20 linux subs to keep up on all the conversation. Decentralizatin is a good idea, but it is not very user friendly, and it only works well for those who are computer savvy. for the other 90% of internet users, it is extremely complex and confusing.