Every 10th Shopper for Gift Cards gets a Rs.100 Amazon.in Gift Card on orders above Rs.500
http://www.amazon.in/b/ref=wk29_gc_sweep/ref=s9_acss_bw_hsb_giftcard_s1_n?_encoding=UTF8&ie=UTF8&node=10838617031

To enter the Offer you must make a minimum purchase Rs.500 for Amazon.in E-Mail Gift Cards. The offer is valid only on Amazon.in Email Gift Cards listed on this Gift Cards page. It is not valid on other formats like greeting card, gift boxes and multi-packs. It is not valid on Top-up Your Gift Card balance.

Offer Duration: 18th to 24th June, 2016 both days inclusive