Yes, don't count on the planed extra working days (FW = Flexible Work). As buzz wrote, some fleets are overcrewed and it is unlikely that they need to motivate any or many existing fleet crew to do FW204 or more in summer (JUN-SEP). On some fleets, all got their flex work requests approved, due to crewing. Count on your base salary, per diems and annual block hour bonus when you exceed 100 planned block hours. The rest is just a bonus.