Besides the fact that the Tiers are monthly credits, what is the benefit of getting any Tier compared to going directly to the website? I ask because on the pricing page in the FAQs section, you see the following:

"There are no limits based on users, sending domains, or credentials. You have full access to all core features."

It takes Tier 3 to get Unlimited sending domains, but none of the tiers have unlimited users (workspace members). If I am reading everything correctly, one could get the Growth package for $45 and get 250k credits, unlimited sending domains, and unlimited users.

How could an Appsumo user, long after the campaign is done, get more users/domains in accordance with their respective Tier?

I would appreciate any clarification. Thank You!