But, if you go through my links, you will see that they were indeed deliberately tricking customers. Price tracking websites show that most Flipkart on-sale products' prices were hiked to double their original pricing and then discounts were applied. In one case, a printer was hiked from Rs. 10000 to Rs. 50000 and then sold at a 'discounted' Rs. 11000. Apart from this, they silently increased sale price when adding products to cart, and cancelled orders which people had gotten for bargain prices.
In addition, they also had numerous examples where their claimed discount percentage was not the one that was applied to the product. A discount of 3% was advertised as discount of 10%, 40 Rs off was advertised as 500 Rs off, etc.
All this has managed to completely put me off Flipkart. Prior to this I was a very happy Flipkart customer, and would preferentially order stuff from Flipkart even if it was available on Amazon for marginally lower prices. Even though I did not personally experience any of the Big Billion Day issues, the way Flipkart has handled this 'sale', has left me totally disgusted with them. I think, I'll stick to Amazon/Snapdeal from now on.