So why mourn at bitmain? Mourn at real life ...... it's the one that distracted you from the bargain of the century .... Yeah.... no.

Are you suggesting the competition raise the prices of their goods from $479 to $529, and we should be OK with that ?
Psychology Question for you: If I was hesitant purchasing something at $341, why should I be less hesitant to purchase it at $370 ? Why would I have more motivation to purchase at $370 when it was just $341 earlier ?
The competition do not set the price for bitmain. In any case, in a perfect market, buyers will choose the lower price (and for some reason I believe bitmain know this obscure fact), so go ahead and buy from the competition.
Answer to your psycology question is simple, I wonder why you could not figure it out. (and there-in lies your answer, thing is, can you figure that out?)