The value, to the company, of a codeshare decreases the more the company is growing on its own. Inversely, that value increases as the company shrinks or contracts. That is the reason 1.F is written that way. LOA 12 stripped that protection away and gave them an incentive to create a big codeshare exactly when it offered a big value to the airline and the smallest value/greatest harm to the pilots.

The CBA didn’t give codesharing away, it only allowed it when it was the least efficient way to generate revenue.

It’s a yield proposition.

.15 cents on the dollar isn’t very much when you can make $15 on your own. 15 cents when you’re only making $1 is huge.