Question for any Omni pilots out there:

I understand that international DH flights over 3 hours are put in business class, but pilots can opt out of the upgrade in exchange for a stipend from the company. I was just curious if this is something you can choose on a flight-by-flight basis, or if you have to choose it on your travel preferences? And if so, how often can you change your mind?

For example, I might want the business class upgrade on a 15 hour flight, but might just take the stipend for a 4 hour flight.

As nice as business class sounds on a long flight, I'm hearing that some pilots are making several thousand dollars per month just by opting for economy class.

Thoughts? Thanks!