When I first bought Sins (2008? 2009?) I seem to recall hearing that we could share the game with our friends locally, and all play over lan and that this was not frowned upon. I understand only 1 could logon to the world server, but I believe the statement clarified we could still (officially endorsed) play with 4 people off 1 licensed copy.

Since I cannot find said post anymore, I want to know if this is/was ever allowed / endorsed. If so is it still endorsed? 

Even if it still endorsed, how will this work with rebellion since its on steam now instead of Impulse / GameStop App

Thanks for your time.