You might see these offers after payment completion at ICICI or HDFC netbanking sites, wherein upon entering a code, you are offered a bag or watch "free" as "exclusive offer". Upon following the URL, you’re asked to pay "Only shipping and handling charges of Rs. 449 to Rs. 649 applicable", depending on the product you choose whose retails prices are shown to be anywhere between Rs. 2499 and Rs. 4499.
I can tell from the experience of buying a watch and a bag that the products are worth much less than their handling charges. Both the watch and the bag had trashy finish and product quality was abysmal. Please stay away from this offer- you’re better off spending that money elsewhere.