All in the name of helping you level-up your Prestashop skills.
Access to purchased modules and its new releases, support service, regular updates.
No problem. The module is still working but will not be able to access new releases and support service.
No. Your purchased modules should be used on your sites.
Use a purchased module on a site. Use on another site - buy a new license.
No. That way you are able to purchase a renewal if you'd like to.
The maximum the number of download as your membership licenses allow.