Scenario: Training letter is published and Pilots A, B, and C are all awarded ITU training dates to aircraft X. Pilots A and C agree to exchange training dates.
According to CBA paragraph, 24.D.6: "Pilots may exchange training dates with another pilot who received the award from the same posting or a subsequent posting, with flight management approval, provided that every pilot, with an award from that posting or a subsequent posting, who would be entitled to passover pay if the switch were at Company request, consents in writing not to block the training exchange, as no passover pay would be generated with the approval or denial of said exchange, since the swap request is being made by a pilot, not the Company and does not otherwise satisfy the requirements of Section 24.D.2.a."
What advantage would Pilot B gain (he has a training date that is between Pilot A and Pilot C) by blocking the exchange?
Thanks!

Pilot C