Does anyone's hashrates fall after some time with dstm? I've got 8x1070's and I start around 3,700-3,800 sols and it eventually settles around 3,500-3,600 after about 1 hour.
Yep. EWBF does the same. This miner as well as ewbf are very inefficiently coded. They hog the CPU and the hashrate drops. (you may not see it in top (linux) or task manager (win), but they generate a hell of a lot of interrupt requests).
Open source miners like ethminer or ccminer (for other algos) don't have this problem. I donated to those. Charging 2% here from all profits is just ridiculous , this guy is making millions monthly yet he hides behind anonymity and brilliant "customer service" (yes, you are paying him).