Plans are for delivery guarantees, throughput limits, support response, and SLA. Imagery pricing is pay-as-you-go (credits).
Pick the plan that matches how hard you’ll use the API and what response/SLA you need.
Data pricing is driven by your usage — not your plan.
Pick the plan by how many people need access, how fast you need delivery, and whether you need SLA. If you’re unsure, start on Free/Starter and upgrade when you hit throughput or support limits.