I am looking to get more information on the process of signing up! I am currently just using the basic free application but we, as an organization are perhaps looking to sign up for the Standard. We are wondering if there is a limit on the amount of users, if so, what is it? And if we needed to remove/add users, what is the process/cost? For example, if we need 20 users and then we hire 5 more, is that easy? and how is that billed? What if we need to remove 10 users does the price change accordingly? Please advise