Since we want to give the best service to our pro customers, we had to limit our resources for free users. Users with free account can use PushBots up until they have 1000 users.
We believe 1000 users is a reasonable number to try PushBots and see if you are getting the value you want. After passing this number, users on free accounts will continue to register new devices but will not be able to send push campaigns via our dashboard or API.