I know that Tier 3 allows 10 domains, and Tier 4 — 50 domains. This is the only difference between them that is specified in the terms on AppSumo. Are there any other differences between Tier 3 and Tier 4? In your comments on other questions, you mentioned the availability of Webhooks and API for Tier 4, but you did not mention anything about their availability for Tier 3. There is no information about this in the terms on AppSumo.