Hello Zapier! i was wondering if i can use my Zapier to send automation emails with the following condition: We have a landing page which collects emails. For the first 20 people that subscribe we send them EMAIL 1. Then for the next 20 people that subscribe we send them EMAIL 2. Eventually our target is to set it to send 70 EMAILS for every 20 people on a first come first served basis. Can zapier helps me achieve this?