The way I see it is this:
EA looks at the games they release and the gaming industry like a factory. There must be an assembling line and a list of specialized factory workers doing what the managers want them to produce and work through the line in the way they want it to go. Profits come...
I don't think they'll answer to requests, at least not singular ones. From a marketing and profit point of view these deals are probably announced to clear the warehouses or some other kind of similar explanation :)
The power supply may not be an item to be excited about but it's one you should never be cheap, don't save on it or you may find it more costly or inconvenient later on, never save on the PS and get a good one ;)
They do deals for what they think they need to sell faster, if it was based on everyone's wishes they'd be hardly making a profit at all or have a consensus on the deals they're currently having by asking the users :cool:
They're sent by email and it's not everyone that receives them I think I've read something about only some people receiving these ebay coupons and they're not very common but if you can use them great :cool: