I'm not seeing a problem with this. Not because you are a bad developer, but that you don't match the type of person they want to hire at that time.
> I'm 100% certain that I make more business sense to hire than all of your average workoholic startup developer, but I would never be considered.
What's your experience as a "startup developer" that you feel justified in making that claim?
> In short there is soooo much that you need to consider when hiring.
Of course. But I don't see Github being the only thing to consider, nor do I see it as being something that should be ignored. It's a piece of the puzzle.
You're a programmer. A good one at that. But have you ever stopped to consider they need someone more than that for where they are at? Someone who can be more than a programmer?