Can some one upgrade for ad seller pro only in free forums?

Hello I am interested for ad seller pro as tool for making forum generate income and survive.
1. Can you give me only 7 days trial? so that I learn how this tool works by practical but I will not receive any money from members in the trial period.


2. For a person who have little money can he/she upgrade for ad seller pro only ? It means he/she has failed to upgrade for unlimited ad free and ultimate plan
Please answer and consider my request.

Demo can be seen at http://demoforum.createaforum.com
AdSeller Pro is only part of the ultimate plan.

Sorry officer that demo is for some one who buy ad but my problem I needed demo for a publisher/admin to see how the system work, how ads display on the forum, how can I set discount if any. Can I approve ad if some has no credit card and paypal account . That is why I asked even 7 days trial for admin that is me is enough. Sorry for disturbing you