a reputation system
actions on FC should be measured in reputation. Learning should earn the user reputation for every day he learns, maybe with an extra boost for streaks. Sharing, editing commenting, inviting etc, should all be measured with reputation points with no "stupid" way to get a million reputation in an hour by using some bot that stresses our server.
Reputation can be used to limit access to certain features. Zero reputation should not be allowed to upload images or share public cardsets. This gives those actions a notion of value and stops spammer and harmful actions.
Idea is accepted and the Product Owner needs to create a Story of it.