question about buying an AM license. if there's a group of us that are all running the same thing, with the same settings, can we share an Enterprise license with the multi-user login? or does that break the ToS?

It's not possible to run multiple instances of Awesome Miner at the same time on a single computer. Even if you create multiple accounts, you cannot use the application at the same time. The web interface allows multiple users to login, but that one is limited in terms of functionality.