how does pricing work here? confused about credits vs seats

trying to figure out the pricing before i commit my team. few questions: - are workflows billed per execution or flat rate? - if i have 5 team members do i need 5 seats? - what counts as a credit and how fast do they get used up? - is there a free tier for testing things out? we got burned by zapier pricing where it looked cheap until we realized every step in a multi-step zap counted as a separate task. our 20/month plan turned into 200/month real quick