People can exchange altcoins on shapeshift.io. That makes them an exchange. Why isn’t shapeshift.io listed on coinmarketcap then? They should be listed there and contribute to the price charts. If I was to make a shapeshift.io rival web service and provided a price index API for sites such as coinmarketcap, would they accept it and start tracking the price of nubits according to my hypothetical service?
I believe ShapeShift uses outside exchanges like BTER and acts as an intermediary. Adding them to CMC would cause duplication of numbers.
B&C and shapeshift, cooperation?
Yes and no. What if shapeshift.io utilizes bitstamp to reduce the risk of bitcoins losing their value? But wait a second, bitstamp does not have NBT trading pair at all. That means there is no duplication possible! In these cases, coinmarketcap should include data from shapeshift.io.