Just to let you know, I agree with you in substance. If it makes a difference to someone whether you have your code on github or sourceforge, then they're obvio

Just to let you know, I agree with you in substance. If it makes a difference to someone whether you have your code on github or sourceforge, then they're obviously pushing a dogmatic view. But like you say, that's not github's fault, so conflating them and a subset of their users in an argument doesn't seem productive.