Just switched off my Antminer L3's today as they are currently unprofitable.

So I got that same email and was too busy to deal with it right away. When I did get around to looking at things I wanted to see how bad it was. Well, it turns out that there must have been some kind of outage on 25-October because there was a gap in rewards from 03:13 hours until 20:25 hours, then a bunch of rewards between 20:27 hours to 20:44 hours. The final total for the day was ~35% below the previous days and the subsequent days. Additionally, there was some weird behavior with the hosting fees such that the charges were ~50% higher than usual based on previous and subsequent days.
The semi-colon separated values file that you can download with the hosting fees, mining rewards, and wtt rental earnings was hard on the eyes so I wrote some python 3 code to break it down for me such that I have one line per day that shows all three values and a final column that shows me the net. It's not ready for prime time, but when it is I'll post the code here. It's about 20 lines of code, excluding blank lines and comments.