If you are truly so bullish on cryptocoins that you predict that you can mine for a year or more to subsidize the card, then you could be better off simply buying an equally-powerful NV card for less money (and possibly with better game bundle), and investing the difference by directly buying cryptocoins, if the price difference is significant. Historically, buying-and-holding coins has been 10 to 20 times more profitable than mining so it doesn't take very much direct investment to get results that would take a LOT of mining equipment.
Buying and holding $700 worth of Litecoins (LTC) in January 2013 would have netted you the same profit that would have taken ~$8000 in mining and electricity costs to generate over the course of a year, assuming average USA electricity prices.
Q: If LTC went to zero tomorrow, who would lose more?
A: The miner. The buyer-and-holder of LTC would lose $700, but the miner would lose about $5000-6000 ($8000 minus whatever he could recover from old, used hardware at back-to-earth prices--remember that 2 months ago, NEW 7950s went on sale for as low as $150). Electricity bills add up!
Thus, for larger mining operations where you buy more GPU than you would normally buy, mining is indeed risky. Even in situations where you would normally be in the market for a R9 290/X anyway for gaming, you still have heat/noise issues and are still paying for electricity and inflated prices up front.
Quite a few people have financial interests in AMD, either working directly for AMD and its AIBs and subcontractors, or holding AMD-related stocks and derivatives. They keep pushing people to buy AMD cards at inflated prices without mentioning other options that are just as good or better.