not that it's terribly important, but lots of people use claymore's miner.
two indications: watching closely the hashrate on flypool(about 40% of total zec hashrate) when the new miner is released it would look like everyone is using it...

also if you calculate the amount claymore made on his devfee zec account (the one posted here earlier) - it's 2.5% of the 10% of the total zec in circulation .. also it could be not the only one...
yes lots use it but do you want to be the one to suggest the proposal to and coordinate it all with the miners. Dont forget Claymore will have got more users when version 8 was bundled with the nicehash miner.
As was stated earlier all you would be doing if you mananged to make the deal with all the miners is create a artificial price point.
In the end it is artificial indeed, though sustained through guessing how much people are willing to pay from zcash when the supply is manipulated.
Zcash being VAT free (at least if traded to bitcoin) and it´s supposed anonymity may be the natural growing factors that make the price go boom by itself in the future. Though it doesn´t mean that we should allow coin dumping to reduce the price too much right now and centralized selling would reduce it´s effect in the meanwhile + the suppliers of zcash get a better share for their efforts? I´m just speculating though. One would first need to contact the pools and make the deal happen somehow. Not going to do that by myself that´s for sure

. How about you @claymore? Maybe you could try?