Matchan it already explains ne...
Its not totally free bn ,
For a party of 2, the cardholder will get 1/2 of the bill value wiped out
For a party of 3, the cardholder will get 1/3 of the bill value wiped out
For a party of 4, the cardholder will get 1/4 of the bill value wiped out
For a party of 5, the cardholder will get 1/5 of the bill value wiped out
itz like that...