Obviously mining Ethereum would be out of the question but coins based on the cryptonight algo are not memory intensive. I dont think you understand how lucrative this really is, people build mining rigs generally use a $50 celeron CPU. That CPU will never ROI itself and will never do anything for you beyond run your rig.
With these, and the readily available mining motherboards for only $80, it would make an excellent base CPU for a mining rig if it were actually able to pull some weight. A much better alternative to the classic celeron people use, and much more powerful as well. Basically the chip would be like have an extra GPU in your system, and would pay itself off and then be all profit after about 3 months.