It was a *ONE TIME* $7500 "retention bonus" for Captains, divided into 3 installments. Anyone who upgraded after the bonus was agreed to does not get the bonus nor do they get their $10,000 F.O. bonus.

So your first sentence is correct - we ALL got raises not too long ago,... except for half of us.

I can only conclude that AA does not wish to "retain" us after December 1, 2017, which is when the last of the Captain retention bonus installment is supposed to be paid.