I've been looking to add some more S9s to my minifarm. I tried to pull the trigger in last night's sale for 10 units, but my order ultimately failed. However, I came across the below calculator this morning and it has given me great pause. It shows that the difficulty level is ramping up so fast that they will never be profitable. Where do you guys stand on this? I'd really like to hear where you guys think all of this is headed.