A: Hi, Savio, I am not sure if understand all your questions. Let me clarify what I can and continue asking if needed.

The hour limit clause is there to protect us from illegal sharing of one account by multiple users. You don't have to worry about it. It does not limit any normal usage, it's there just for case we see some abnormal and clearly malicious usage, we can use it to disable given account.

Yes, you can buy an extra code and upgrade from previous campaign Tier 4, just note that you will be upgraded to the limits and features currently listed here (these are a bit lower since Tier 5 used to be unlimited).

BYOK is possible for AI apis, so it removes the "GPT credits" limit, but the keyword and web search will still be done internally and spend credits.

I am not sure what you mean by client role. We have workspaces, there are members and admins, where members have access as defined per each folder while admins can edit the folders and access. Then we have internal users where internal users share the limits and features with the account owner, with the exception that they can't create workspaces.

The can't sell or rent part of the fair use policy is there to prevent selling the internal user accounts publicly to anyone. If you are an agency working for a client, you give the client an internal user account and charge him for that, that is a fair usage for as long as you work with the client.