Go to Matomy and click free button. Find a offer like the pic and click it. All you need to do is,
1) set the date of check in and check out.
2 ) Once you found a random hotel, click SELECT , the button is below the price.http://prntscr.com/8cu9m
3) They will show the random hotel provider, just click GO. http://prntscr.com/8cua9
4) If something like this appear http://prntscr.com/8cubh , that mean you already complete the offer.
MATOMY (Go to www.ninjasaga.com and find Matomy button in orange bar.http://prntscr.com/8cugs)