truth is: the majority of end user don't care if they can only sign up with facebook. it's even easier for them as they have less choice to make. This is only a

truth is: the majority of end user don't care if they can only sign up with facebook. it's even easier for them as they have less choice to make. This is only a problem for highly privacy and technology aware folks, like tech bloggers or developers. Apparently, they are not the target audience.