would depend how long it takes them to make more than the cost of the hardware, but they are likely to be reselling the old cards and picking up the new to keep with the top end of the curve so for AMD it is likely big income.
the people who lose are likely the people who buy the cars second hand as even 6 months cryptocurrency mining would likely be the equivalent of several years in the average gaming PC, meaning the cards on a use standpoint would be much older than they seem. would be like buying a 6 month old car with 40k miles on it over a 2 year old car with 10k miles on it.
Chinese vs Korean animosity has a long and tired history. It's not surprising that a Chinese company hosting an event in (practically) China having their Chinese champion destroyed by a Korean would behave this way.
It includes full locomotion and was confirmed at least two weeks ago (one week prior to your post). There's some places you need to get with teleporting though but shouldn't ruin your experience.
A smart idea, but how would I control the game with both hands occupied?
AMD aren't really that bothered who buys their cards, it all ends up on their bottom line. The same goes for the partner boards manufactures, for the most part, except it does nothing for their brand recognition in the wider market.