I just purchased Unity Pro and I cannot activate it at all. There are no activations but it says it has reached the maximum number of activations. I started with the free trial and tried revoking and re-granting my seat and both methods of activation. I sent a support ticket and it says it will take 2 months
RESOLVED: “entitlement activations are usually due to your Unity Personal license not being returned. For future reference purposes, you can easily return entitlement activations by logging out of your Unity account after using it”. I realize now I was also using a VPN if that’s relevant.