Nope. You will be able to download Torus for free once it has launched, regardless of whether you choose to use BrightScan or not. They do use a common login, and work best in conjunction with each other though to protect your devices, but Torus on its own, provides a safe browsing experience, regardless.
Furthermore, OpenAVN does not sell your data to anyone, nor does OpenAVN invade your privacy. Instead, Torus learns about the beacons and adware from the sites you visit, to better learn what to disable in the future. We want people to have the safest browsing experiences possible.