I can confirm that Blokforge does support their customers - they came through for me on a couple of transactions.  Based on the purchases I have done and their response to those of us in the forum, I will look there first for new miner related products in the future.  Hopefully when the 841s come out they will be priced competitively to the S9s, the 821s or whatever else maybe on the market and will be available from Blokforge.

I got one of the pricey 821s (with help from Blokforge) but I do not have any regrets.  Those who bought knew they were taking a risk of never being super profitable.  Personally, I see mining as a risky investment - I mine as long as possible to get coins with the firm belief bitcoin will keep rising over the next 10-15 years.  Also, getting the Avalon miners is the best option if you are like me and run them at home in a spare room or basement.  I do not have a data center to properly house the crap jet-engine/unreliable hardware from Bitmain (I know they are industrial but they are still crappily built machines).  The 741s run so much better (cooler, quieter and with almost no failures) than any of the S5, S7, or S9s I have used (about 20 of them over the last three years).  Hopefully, the 821s (and 841s) will be just as good.
 
It sounds like some of the buyers are cancelling their 821 orders after the fact (possibly because the prices are going back down).  Unless there is a true hardship (like losing your job or health), this just doesn't seem honest - I guess I am an optimist or a fool!

Finally,  I am a supporter of Blokforge - it is nice to have a trustworthy place to buy from in the US.