Originally Posted by
jdrtravel
This is true for advanced changes. A SDC (same day change within 24 hours of departure) should be free if space is available.
You're confusing the SDC fare class restrictions, which don't exist for paid FC fares, and the SDC fee waiver, which only applies to GM+.
Fare class restrictions (or lack thereof) are good for everyone, but FOs and nonelites must still pay the $50 SDC fee.