Nicehash rates are probably high right now. This will give you a chance to get more of your shares into the share chain and increase the amount of reward per block you'll get should a block be found. The ≥1 PH/s of hashrate on my nodes will be staying on jtoomimnet p2pool no matter what, so we will find a block eventually even if the Nicehash renters never come back. It might take a few weeks, though.