Purchasing an Invision Community License
Only the developer has the right to sell a license to use Invision Community software; no other representatives, sites or companies can do this. You can purchase a license on the developer's website using the link:
Buy a license for Invision Community
A license to use Invision Community is purchased for an unlimited period, however, after the 6-month period, you will no longer be able to receive technical support as an active customer, and you will also not be able to receive updates for purchased applications.