I've watched my cousin play graal is 2012 but only started playing myself in 2013.
wow, sounds like life was a dream back then.
If you registered you Amazon AppStore account with a fake credit card (creditcardgenerator, can't remember the exact link) you can buy a free $27500 1 time use card. I've done it over 5 times, however they patched it last...Winter? But anyway, using amazon coins helps you save money on games. Check it out, it's really awesome.