yes.. but you were able to buy 2x 470 for the price of 1x 1070 (€400). With 2x RX 470 you are getting 54MH/s and with 1x 1070 30MH/s.
But it doesnt make sense to keep buying overprices RX even the GTX cards at this time I believe. Vega should drop the prices a bit and we will also see, how the hashing power would increase and therefore decrease the overal profitability.
I'm not saying it wont be profitable, it still will be, but I'm thinking to buy the equipment cheapest as possible with the mosth hashing power and with the longest lifespan. Even I would like to buy 1070s and there are some around €430, I will still wait for Vega to be out. The attention will move from GTX and they should drop on price.