I have a small group that I am currently DMing for, but our next game, we're switching it up and another person is gonna be the DM. It seems like if I buy Xanathar's Guide for example, nobody else can use it unless I'm hosting (DMing) the session, correct? Has there been any talk about a group license, such as what HeroLab offers? Is there any way around this other than spending $20+ every time we switch DMs?