I've been seeing a pattern of heavy weekend profit taking. I suspect the proceeds are being used for real estate, fast cars, large breasted women and weekend benders involving substance abuse.
It can mine it, just not efficiently.
Years ago back in late 2013 I got an old used Radeon HD5970 and a 2TH/s ASIC pre-order. The HD5970 ROI'd in less than week and it still mines ETH at about 30MH/s. However, I'm still waiting for my ASIC pre-order to arrive. They told me "next week", I'm sure it will arrive any day now....
EDIT:
On an unrelated note I got an Nvidia GTX590 and the Radeon HD5970 running bridged in the same box with Windows 10 and DX12. They ran for about 30 seconds before the 1200W gold PSU said no way. I wonder how MS got the cats and dogs to live together like that.