If the account is outside of stirling-pdf it doesn't count, so if its a cloudron account, this doesn't count (it doesn't actually make an account in stirling as far as I am aware?)
Grandfathering will allow existing accounts but wont allow you to add new ones even if you were at 500 and remove 100, you cant add any since you are past the 5 limit. Yes we do have a admin dashboard etc but since most don't actually use login via stirling many don't even know!.
Also something extra to note
From our opt in analytics
Most of our users don't have login enabled so have never seen seen this and wont be impacted
And out of that subset 98-99% of users fall under the 5 user limit.