there are a few treads about them. I keep a few of them about year and half. here are my experience:
feeding by dead crickets or by cuted Tenebrio larvae, I read that they eat also fruit. Humid substrate with piece of bark where they usualy stay. They can live together but it looks like males are agressive to other males (because i had found a few dead males and no dead female) now i have one male and five females. they layes egs on the bark and females take care about egs. Young hatched about 3 weeks (unfortunately all youngs died ) about one year later (right now) females lay egs again (without molting).
Excuse my English
Photo of M. chilensis