As someone who used to care about streaks, it only takes one small commit and it can be a small reword of a readme ;)
the way I see it, it validates that I am capable of following simple directions and running a python script :3 that's got to be a valuable asset in an employee, right?
I don't care about the contribution streak, but do have friends who comment on theirs on Twitter now and then. I suppose it's just another thing to be proud of...
But, this is true whether you commit a few irrelevant lines manually or automatically. So if you're going to do it just for the sake of showing off, at least make it efficient, no? :P