My opinion is you decide whether you want to be a part of this experiment long term or not. If you do, then you don't power down until you feel your stake is sufficient for the role you want (at that point you might power down while continuing to earn so as to maintain a desired stake holding). If you don't want to be a part long term, I don't see anything wrong with that, just power down and treat it as part of the income you earned from your successful posts.