[xenonite]

Cool idea! I am fascinated that this is growing. I wouldn't have guessed so in the first place.

Is there interaction happening between the participants?

> every time we do it we know fewer of the people who show up.

This sounds like the retention rate is low, or is this a wrong conclusion?

Also I would be interested to learn for whom this is fun, and why.

[jakebasile]

> This sounds like the retention rate is low, or is this a wrong conclusion?

I think they mean that the percentage of their close friends goes down each time, as more people are invited. Network effect.

[blhack]

It means that every time we do it the network grows. It started with our friends, and now it’s our friends and their friends, and their friends and so on.