If I get called off some standby's early in the month crew management will always take some longer trips off me at the end of the month to keep my overtime low....every airline I have been with does that.....it's not just isolated with your airline.
Also, never do crew management (or whatever you call them at EK) any favours.
People always seem to think that if they do crew management a favour then CM will owe them one......not so.
Crew Management in any airline has no memory to recall goodwill....you can't bank favours with them, so don't try.
Enjoy your days off instead.
Eternity.