<font face="Verdana, Arial, Helvetica, sans-serif" size="2">In a sound business model, the premium product should be sold for revenue, not given away.</font>
** DISCLAIMER ** - the following statement is based on fact, and I am placing on record I am VERY glad UA does not adhere to thisd policy

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The most profitable airline on earth right now, and for some years AFAIK is Singapore Airlines.
Select the two correct multiple choice answers here. [Small hint for frequent users of US based airlines - answer (a) is not the correct choice.] :
(A) SQ gives away upgrades like candy.
(B} SQ will ALWAYS rather see a 747 take off with an entirely empty First cabin than operationally upgrade a SINGLE person, even paid biz. class pax.
(C) Which airline has the highest percentage of PAID pax in Biz and First?