Our motivation with the free plan is to let people who are interested evaluate the service. We tried a 30day free trial, but we heard from some users that they really didn't want to put in a credit card to sign up at first, and some didn't think it was enough time.
By charging more as the number of users grows it ties the cost to the actual value they're getting. With the free tier at 50 users, we think that gives everyone a chance to try it out without giving away the farm.
By charging more as the number of users grows it ties the cost to the actual value they're getting. With the free tier at 50 users, we think that gives everyone a chance to try it out without giving away the farm.