Attract capital and people India's income tax authorities are sending a tax notice to half a million bitcoin users who are trading in encrypted currencies. Why? The Barnsley based REHAU fabricator has seen a surge in enquiries from installers and consumers in response to its ongoing advertising, PR and web campaign and these are being passed to its stockists and distributors nationwide. A CBI survey of 109 companies this month found that online sales of black Friday and cyber Monday were "unremarkable". Not only can consumers have more choices in the price, variety and service of commodities, but also make it better for enterprises to purchase production factors and sales products.