You can get an additional 30% discount if you buy two or more Advanced Pack versions.
Yes, you can install two copies of Advanced Pack, one for production and one for development server.
There is no resell program, but we allow to do this if each copy of Advanced Pack was bought from our web site. Advanced Pack includes unique ID. It is strictly restricted to install one Advanced Pack license for multiple customers or provide any SaaS solutions.
If you contact us, we can provide 30% discount for next licenses.
No, you shouldn’t, but if you want to get updates and bug fixes, then you need to pay annual subscription.
When you bought Advanced Pack, you get an access to the customer portal. You can download the newest Advanced Pack version from the customer portal and then just install it in EspoCRM Administration » Extensions.