Well, actually, 1 cloud account does not equal tenant in Orchestrator. In fact, each cloud account can have access to multiple Orchestrator instances 
The process described above is to create multiple Cloud accounts. However, keep in mind that, license-wise, one Community User should not have more than 1 Cloud account with 1 Orchestrator instance included.
If you are an Enterprise, you still need just one Cloud account, but will then be able to ‘spawn’ multiple tenants under your Services tab.
I hope it clears things up