Nope! Purely speculation based on circumstantial observations (see above) and trends in the industry.

e.g. in another thread, the recent clarification/validation of policy on day of flight free up of F space and priority to sell before complimentary upgrading.

I don't know if this is a recent change in policy but many people were surprised by it.

Also, I notice a lot of F space held back even well into the upgrade window on my flights so I assumed this was the objective. On a transcon, I would imagine they would want to try hard to sell there as they have the best chance.