Too Long; Didn't Read
Product can’t be successful and keep its game up for a longer run unless it exploit the behavioural domain of its users. Every product which became the epitome of human creation, for instance Facebook or Google, have cleverly utilised cognitive and behavioural psychology of its user base. We are naturally wired to want to return favours. A tried-and-tested way in a typical E-Commerce industry is to give something extra to instil a delight in the customer, which in return gets them coming back to you again and again.