Thanks for your feedback. Just wanted to let you know we ask people to sign in because we also answer users' questions and we want real people using the product. BTW, it's super quick if you use your Google or FB credentials.
I don’t want to SSO with a site that I don’t have any idea of the quality or whether it will serve my needs. I can’t view more than subject headers without signing in - at least give me an idea of what signing up gives me.