Earlier quoted context omitted.
You're not really stacking your long-run odds any more than you're stacking your odds by playing the lottery a lot. The odds are stacked in favour of anyone who submits a lot and submits early rather than in favour of someone who submits well.
I'm not sure what you mean by submitting "early", or what experience you're drawing on here (your account has submitted zero stories!), but am pretty sure that the odds favour a user who submits a lot that is good [1] and that the latter is where the emphasis should be. We're also working on systems to amplify this effect, so it is going to get more true with time. The point as far as karma goes is not to be attached…
I'm perfectly happy to take your word that you're working on something better.