OK, The subscriber will pay his fee and 80% goes to the authors and experts and 20% goes to the system. But will the user (simple subscriber) know exactly to whom his money got via using free widget? Maybe he wants to control the percentage of money going to experts or authors? Cause he may distrust widget fund in somewhat way.
In our smart-contract core there will be a voting system. Some number of users can set a question on voting and the community could change the rules of the system.