Pro is not the same as Professional.

I get you need to earn money, but overcomplicating the billing is frustrating. I need a team member and thought Professional is enough. Then I wanted to opt in to audit logs and well I need "Pro", thought its a bug, now I understand you just want 6 dollars more.

At the same time, I can only add a team member to all my services, but I dont want my employee to see that. Imagine having a junior on an internal project, now he can all of a sudden change a DB connection string.