This. Abuse causes a huge headache and will drain resources. If you are sincerely interested in offering this, provide a great value and feature set but charge

This. Abuse causes a huge headache and will drain resources. If you are sincerely interested in offering this, provide a great value and feature set but charge enough to keep the garbage out..its a catch 22 in that having a higher price keeps the service profitable but having a higher price also means possibly never gaining traction. If you ever figure out how to solve that problem scrap this and open up a business selling that solution :)