I fly for Air Atlanta. We are "highly discouraged" to write up anything that may ground the airplane. It is clear we may be invited to take unrequested time off if we do write up maintenance items.
Also, taking extra fuel over flight plan is highly discouraged.
That is a lie.
There is a company memo requiring the crews to add items to the logbook.
I have been with the company over four years and have never even been hinted at to getting time off for not taking a US plane.
We are also allowed to take fuel at our discression, but the Captain must be able to justify it. For the Malaysian contract with up to two tonnes extra not explanation is required.
All this is in the books.