> they agreed that the model and everything it produces is free as part of the terms and conditions > If they don’t think it is mutually beneficial, they don’

> they agreed that the model and everything it produces is free as part of the terms and conditions > If they don’t think it is mutually beneficial, they don’t have to use the site. That's not how contracts work insofar as legal enforcement though. If a judge finds that clause to be unenforceable, then they wouldn't be giving anything up.