Yeah, BM have been too clever for their own good.

Unless you get batch 1. You'll only just ROI on batch 2, then be left with a doorstopper. In some cases (see the XMR saga) you don't even get that. When you factor in the hassle and time spent playing fastest finger, shipping + fees, customs faff, warranty returns to China and then maintaining a dedicated noise-proof, power and cooling area for your asics, it's really not worth it at all.

Not really. It still doesn't make much sense to screw over batch 1 investors. Here's the math behind it:

$2000-$850 = $1150 <- total difference that you need to make up

Estimated profits (ASIC is OC-ed to 15k sols, conservative)

   1st week of mining: $30 per day * 7 days = $210
   2nd week of mining: $25 per day * 7 days = $175
   3rd week of mining: $20 per day * 7 days = $140
   4th week of mining: $15 per day * 7 days = $105
   5th week of mining: $12.5 per day * 7 days = $87.5
   6th week of mining: $10 per day * 7 days = $70
   7th week of mining: $8 per day * 7 days = $56
+ 8th week of mining: $6 per day * 7 days = $42
-----------------------------------------------------------
Total value mined after 8 weeks (2 months = equal time to receive new batch orders which only cost $850 per Z9 ASIC) = $885.5

You would have earned more if you just waited and bought the $850 version. To be specific you would have $300 ($1150-850) more if you simply buy the latest batch. Fu bitmain.

Unfortunately the government in any country has the ability to take away cryptocurrency or even regulate it. One of the main reasons why the government decides to ban cryptocurrency is because they are not able to regulate it enoug.

Just relax. From that situation I think that they are carefully studying about crypto and blockchain whether it will be a threat to their economy or not.