WhatsApp service extended by six months for free in the last month

WhatsApp, the world's favorite cross platform mobile messenger has extended its service for additional six months for free.

WhatsApp is free for the first one year, after which users have to pay 1$ every year.

I was surprised to see that WhatsApp was kind enough to give me free additional six months.
My expiration date for the first year was October 16 2012 which was extended to 16 Apr 2013.

  
 To know what your whatsapp service expiration date is select Settings >> Account.