Both.
Put it to you this way. If it’s starting to look like a blanket open-ended site license for Office or Windows is a cheaper option, you’re probably in the “large” company or organization class.
Somehow the idea that a company of sufficient size to need 50-100 workstations doesn’t need any kind of domain security to control data access and provide an audit trail doesn’t sound right. Either that, or I’m used to dealing with a lot more sensitive data than your customers.