Any idea about the legal implications of the nodes?
What if somebody is downloading illegal stuff using my node?
If you run an exit node it's like running an tor-exit-node so it's risky as they say here
https://mvp.mysterium.network/downloadsWarning!
There are directly risks by running exit node and you should take care of it. Mysterium Network does not take any risks regarding to running exit node. You accept to take all responsibility for running exit node on your IP address.
Sorry if that's a stupid question, but how does this exit-node stuff work? what is the function? how many do we need?
In Tor it's like:
You connect with your home ip to a server and this server connects you with his ip over another server (middle-node) to a third server which is the exit node. so on your way through the internet your ip is "changed" 3 times and therefore it gives you privacy.
i don't exactly know if mysterium will act like that or only like a normel vpn-service where you connect with one server and have his ip so your home ip is "changed" only once. Maybe someone else konw this?
the more exit nodes we have the better/faster the network will work. Because it's also depends on shared bandwidth etc.