It would be nice to attract prospective clients and ideators without advertising budget and make this site full of people, and growing up fast. Come up with a viral mechanism for attracting new interested visitors at brainstorming.com. "Viral" means that people attract people for some reason.
For example, hotmail.com when starting (in 1996), added a line in each message "Get your free email at Hotmail". At that time email boxes were paid, so Hotmail offerred something better. Also, they had the media to communicate their offer to numerous people: in emails they send to other people using their service.