this is a good idea. Some people that have paid for licenses, did not do so just to remove the footers but purely to support the Boonex development, etc. So I agree that an option in admin panel to have the footers or not for paid versions would be a good option. Boonex, you may find that people do want to leave them there for some as a way to generate income as an affiliate.
Below is the legacy version of the Boonex site, maintained for Dolphin.Pro 7.x support.
The new Dolphin solution is powered by UNA Community Management System.