Originally Posted by
SuperFlyBoy
No, actually - this is also what SQ does with all business awards from other carriers.
...
We really do not know whether it is because DL or UA will not pay SQ for a C seat, but it's *most* probably because SQ is so stingy that they do not want to give the other carrier's pax the benefit for the last sector in the original class of travel...
So you don't know either.

Until you do, your most probable hypothesis is only 'most probable' to you. SQ doesn't do this to BD redemptions, so are you saying SQ is selectively stingy?