Are you going to upgrade this feature to an Enterprise license one day and then revoke access without a grace period? This happened to one of our Grafana plugins and resulted in a several day outage while we scrambled to sort out the payment.
As your company has shown zero respect for its customers, I will not be using any of your systems.To be absolutely clear it is fair to charge for any of your products, however, if you change it from freemium to paid you can't just pull the plug without reaching out.