Who do you trust more: Janet Jackson and Luther Vandross, or Lil' Jon and the East Side Boyz? See, Janet 'n' Luther claimed 'The Best Things In Life Are Free', yet Lil' Jon and chums disagreed, maintaining that 'Nothing's Free'. It's a quandary.
Admittedly, none of the above were thinking specifically about advertising-funded mobile games when they recorded those songs. Yet those two titles encapsulate the debate around ad-funded games that's currently happening in the mobile industry.