Suddenly, 'permission' is being used as a justification. Almost a threat. Hey buddy, back off. You gave us permission and that's the end of it. Permission is not about justification.
Permission is step one in creating a relationship.
It's just step one. And that first level of permission will last you a very short period of time. For any one marketer, that first 'permission given' soon gets lost in the crowd. Permission expires when you change the rules. If a customer gives you permission to do 'A' and you then add in 'B,' you're breaking the rules and your permission just died.