Usb miners works fine with new coins. The one I have it gives around 0.5 usd per day using a i7 processor. The device cost around 65 usd. It is mining 4 small new coins that are in a mobile wallet for android. So you could reach 150 usd per year depending on coin market price. But i see that when Btc raises the performance in value of the coin are higher. The real issue is that we don't know if in one year these coins could be sold or have even a value. But concept is interesting. Many coins have asic resistant algo, so this increase the chance to use usb miners for low realistic profits.