Do I need a credit card to sign up?
No, you do not. You only need one when you are ready to purchase a plan.
What is "active customer" and how do you calculate it?
We define an active customer as a customer with at least one event (could be data event or mail event) during the billing period.
What happens if I go over my active customer limit?
If you are on a paid plan, nothing changes. We will charge you at the next billing cycle for the extra active customers. We charge $0.01 per active customer over the limit.
If you are on the free plan, we send you a limit warning at 80% and 90% utilization. Once you hit the limit, we notify you and stop receiving further events. Everything else will continue to work as normal.