@ alh yes gear shifts like you said an s-3 is worthless to many but not to all especially if they need space heaters.
Many USA buildings are over ac'd during the summer and people use a space heater to keep the office space comfortable.
I am sure s3's do this all over the world. This type of miner need to be quiet so an s-5 may not help but an avalon 4 would be okay.
I lived in NYC on and off for 30 + years. I can think of 30 or forty spots for s-5's and s-7's to mine where the noise does not matter and power is 'free'.
I am sure many 'off the grid' mines are all over the world.
https://bitcoinwisdom.com/bitcoin/difficultyBitcoin Difficulty: 225,832,872,179
Estimated Next Difficulty: 248,384,697,498 (+9.99%)
Adjust time: After 1314 Blocks, About 8.3 days
Hashrate(?): 1,808,326,660 GH/s
Block Generation Time(?):
1 block: 9.1 minutes
3 blocks: 27.2 minutes
6 blocks: 54.5 minutes
Updated:
the gray line is up again
![](https://ip.bitcointalk.org/?u=https%3A%2F%2Fbitcoinwisdom.com%2Fassets%2Fdifficulty%2Fbitcoin-hash_rate.png%3F1474043430&t=665&c=kx6HiAai0YdGPA)
look at gray line in the red box it has always been over a diff of 240
![](https://ip.bitcointalk.org/?u=https%3A%2F%2Fi.imgur.com%2F5g20q4W.png&t=665&c=phb-exUUciw1XA)