I joined a company like this as a part time job while I was in college. Initially I was told this is a tech support job which I believed. But on the very first day I found what they actually do and my conscience did not allow me to pursue with it and left it immediately.
They used to run the TREE command on CMD after getting the remote access, since the TREE command takes some time to execute they type something like LICENSE EXPIRED. PLEASE RENEW in the mean time.
Thats how they loot money from other people and the worst part is they have no sense of guilt for what they do.