From my personal experience, I rarely travel to github.com directly. I either go to a link of some repo I'm interested in, or I have github.com/login bookmarked

From my personal experience, I rarely travel to github.com directly. I either go to a link of some repo I'm interested in, or I have github.com/login bookmarked so it goes to the login page. Normally I am still logged in too, so github.com goes to my dashboard(?) page anyway. I think you have to ask, if someone is going to github.com, what are the chances they don't have an account and so signup is more applicable. Rather than users who probably have somewhere specific to go or are logged in already and will bypass that page. Just my two cents. I do understand where you're coming from and vaguely remember thinking the same when I first started using github.