DataTank was acquired by BitFury.
I really think that the 60PH of chips just sit on the shelves for a long period of time. Yes I know that there are no proofs, it's just my imagination.
You need more than chips to make a miner. Power is the killer; designing .6 volt or less supplies at 1,000+ amps is a bitch on wheels. BE got around this by doing a lot of small chips with a lot of little power supplies, but as they cranked the density up this could have caught up with them.
Serious bitch on wheels. Moreso if you have to have 50-100 of them on a board to support 50+ hashing chips. Fail one shorted and unit shuts down with a flaming boom.