Could you integrate sharing into the platform so people have the ability to share their ideas on social media and get points for shares (up to a maximum number of points per day to prevent spamming?
This could help spread the message about Circle Lab at lower cost and in a more targeted way than Facebook ads, and would indicate the type of content that you need to submit.
To encourage collaboration, could there be the capacity on the platform to link ideas? If I submitted an idea and someone was inspired by this idea and linked the ideas, could I receive a notification about the "linking"?
Local Meet Ups / Events
It would be great to connect with other people who contribute to the Circle Lab through Meet Ups or events for ideation.