magic filter.
So on the one hand we don't actually have any confirmation about why people appear when they do or why they leave. Sort of. There's this whole complicated alternate timeline thing where basically you from an alternate reality signed up to be an early adopter of the very network we're communicating from.
But, having been here for the better part of a year now, I do have a fairly educated theory on why some of us stay here longer than others. The network we use? Literally makes no sense because it was partially created with magic. There tends to be a pattern I've noticed. Heavy users of the network? Tend to stick around. People who use it less to communicate? Tend to disappear.
I don't know if that's true but if I were worried about someone being sent home, I would use the network to communicate with them as much as possible. Stronger their connection is to the network, the stronger their tether here seems to be.
Again, I can't make any promises but maybe that'll help you.