Why do I need to sign in with an HTC Account to use Viveport?
HTC Account is an HTC membership system that you can use across different HTC services.
You don’t have to sign in to browse the content on Viveport web store. Once you decide to make a purchase, you will have to sign in so that your purchase can be automatically downloaded to your Vive system.However, in Vive software, you will have to sign in so that you can browse all the content that is available to you.
Signing in to HTC Account can also guarantee that you have a way to manage your purchase history.