I'm an educational consultant with a huge contact list from each state. Depending on the number of schools in each state, it's from 30,000-100,000 contacts per state.   I'm currently using Eventbrite to send out notifications to subscribers about upcoming events I am hosting in their areas. They don't care how many contacts I have as long as they are subscribers to my website.   My question is, can my contacts change each month since I don't send out emails to every state each month. I never have more than 100,000 contacts I send to per month, but those contacts do change each month.    If so, how does that work? How am I charged?       ... View more