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.
Still doubtful about this new miner, keep updating us about it. I still don't trust this new "wonderful" price that Bitmain has given us, something smells awfully fishy. If there are issues soon, tell us about it. Otherwise i'll go fish myself a coupon or two and buy one, it'll be nice to put a few s3s out of my rig and replace them with a single s7.