No, this is precisely the great advantage of Ostendis over previous e-recruiting solutions!
If you currently have no vacancies to fill, you can simply convert your Ostendis Professional Edition account into an Ostendis Free Edition account.
From then on, you will no longer pay anything for Ostendis.
Your data will be retained and the functionality of your Ostendis account will be reduced. If you have a new position to fill, you can convert your account back to the Professional Edition with a single mouse click.