With the high dificulty increase is the s9 still profitable
Yes, and when the price of BTC goes back up, the profits should be slightly higher.
I woke up this morning, checked my miners, checked what-to-mine, and I was utterly surprised to find out that profitability from one S9 currently is ~350 USD per month. It is true that difficulty increased one day ago, but profitability is ridiculous now.
I'll still be mining though, once you started you should not give up.
I would say that's a little low but probably not to far off. It also depends on where you mine and how you mine and your electricity cost. I think it's probably closer to $400-$450 per month at the moment for 1 s9 with the current difficulty and price of btc at around $10,800. If btc goes to around $8000 it will not be good for miners. I feel if the price of btc was holding around $14000-$16000 right now it would be a great to be mining. So I'm going to keep mining and hold.