In my opinion it is better that the user can add only the amount of instances which he has bought in his subscription.
If the published instances are related to the bought subscriptions it might be confusing for the user. He might add 10 instances but only 2 get shown. Makes no sence.
On the other side, if the instances first have to be reviewed by the site admin before publishing, how the admin can know how many instances the user has already published and how many he is allowed to publish. He can find it out of course. But it is a lot of work,
I think the first idea of Ordasoft was to restrict the amount of instances that can be added as I can see from the information field of the entity (see photo). Otherwise the text should be changed.