I think that as distribution of the token improves this could be an options as the problem of allowing it now could result in unsustainable runs on the currency if not balanced by something else. Although the discount you mention would limit that risk, the discount may become too large in order for the risk taker, @blocktrades in your example, to want the risk for 13 weeks. A potbelly thought would be to either lower the power down period or allow for scaling of the powerdowns instead of then being straight line. So they could ask for lets say up to 50% after one week but as little as 5% for subsequent weeks. The problem continues to be one of not only internal liquidity but external as well.