At Build 2015 Microsoft talked about the future of the Windows Insider program and the company is currently considering two paths to keep the updates flowing to participants.
From Neowin:
From Neowin:
Last week at BUILD, Microsoft talked about the future of the company and the direction that they are headed in. With Windows 10 RTM on the horizon and the Windows Insider program now having over 3.7 million users, many have wondered what will happen after the release of of the operating system..Windows Insider Program: After RTM, the options for Microsoft
After RTM, Microsoft will continue the Insider program and the company will continue to deliver updates via the ring model that they are currently using but the frequency of the updates is still being decided upon.
Speaking with the company, they said they have two options once they hit RTM 1) Deliver a new build/update at the same time every month or 2) Deliver updates as soon as they are ready.