They aren't fooling People. Advertising isn't called fooling, most of the AV company's call themselves as best even though they aren't. They are making Security Products since a decade. Normal users in India don't know much about other security solutions. They have a good reputation in here, other than that they have a very strong network of Dealers & have good partnership with computer vendors in India thus they have more users.
Yeah but i feel there are some better products than Quick Heal like k7 & eScan. These can give a strong competition to other Products available in International Market, not just because they're cheap comparatively but they also offer a decent Protection.