As an online publisher , I have often wondered how the number of visitors to my websites compare with best selling authors in India.
From http://business.in.com/printcontent/17642
An English book was considered a bestseller if it sold 10,000 copies. Five Point Someone and each of the other books he wrote sold a million.
I have been reading a lot of books in the last few months and books published offline are usually of much better quality than most of the content online (especially if it is India specific). An online publisher with a network of websites gets more than one lakh visitors a month , more than a million visitors a year, but monetizing the websites can be difficult. Profits depend both on your technical and writing skills.