and that ^^ is just one of the reasons that I refuse to support BM and switched to Canaan's Avalons several years ago. Ants may be more efficient but I will not tolerate nor do business with a company that operates like BM does.
I have some a1066's on order due the end of the month.
service wise canaan is the best.
innosilicon is poor in many ways a long list can be made
pangolin/microbt I still don't know if it is the builder or reseller or both but they have fallen on hard times.
bitmain is making the most efficient miner but they are a brutal company that practices nasty business. They would kill off BTC in 10 seconds if they had a new coin that made more for them. Ie BCH over BTC if they could force that on us they would.
My circumstances are such that I control and manage 200kwatts soon to be 400kwatts of power. I get ¼ of the power. This allows me some choice of gear but not full choice.
We have
bitmain..................................... 450th adding 250th
whatsminer/microbt/pangolin ...... 490th adding 0th
canaan ..................................... 66th adding 100th
innosilicon ................................ 100th adding 0th
1106th adding 350th = 1456th
we are looking into the a1166 maybe 5 pieces which will be 330th
I also have a 368 coupon from bitmain and an 864 credit due on an order for 2 t17e's
I have no idea how they will deal with that credit as a commodity order.
but in theory I will be getting more gear from bitmain. as I may have 1200+ in coupons and credits coming.
