The reasons for not doing the S7 are:
1) I don't have one
2) Bitmain said they'd send me one but didn't
3) They are no longer worth running. Had they sent me one when they first came out it would have been worth my while to spend time on it. I'm not a chinese slave who works for nothing for a company making 100's of millions of dollars.
4) The pool is where I expend my efforts. It also pays me to do so.