I am one of the aforementioned fools and idiots who purchased an S7 with one fan. And I'm probably going to get another.
I have them hosted so this is not an eyewitness account.
I have one S7 Batch 3 or 4, don't recall. It runs at 4.724 Th/s and the temps are 61, 58, 58. Never had an issue. Good miner
The new S7 Batch 16 runs at 4.723 Th/s and the temps are 63, 61, 64. Now it's only been 2 days, but so far no issues.
Are they saving money? Of course they are. Is the miner shit? Doubtful.
Proof that there really ARE many idiots in the forum. For your information, the S7 miner really IS a piece of shit. I have a few S7 and some Avalon 6 miners. A6 is a much better built machine. S7 is junk, in comparison.