Gatekeeping the user sign-in functionality (even advanced features) seems very short-sighted in that it slows the adoption decision of the platform as a whole to new deployments and potential customers. I am sure that your company valuation is directly linked to the number of deployments and number of users reached, even if they are non-paying users.
Also charging for every user able to login into the system is very hard to justify in many deployment cases that would want to pay for Rocket.Chat, since not all users that can access the chat are valued equally when assessing a ROI calculation.
Why don’t you guys consider charging for the omnichannel agent support thing? It seems very Corporate EE oriented and probably more interesting to charge for feature unlock and also per agent seat as it has a more clear ROI for companies using Rocket Chat.