This would be super beneficial! I hate seeing our Team Members creating deals when no company or contact is associated. We need to have this to run our campaigns that are in place when they are going through the deal stages in the pipelines. Although we have workflows set up to give them a “task” to associate a Contact or Company to their deal its still not as effective as having the contact be required before they can create a deal. I hope HubSpot can get this feature up and running in 2020. SO much potential for the Sales Hub is this can be done!