For Falcon 9 booster B1051, the Starlink V1 L9 mission will be its fifth launch, making it the third SpaceX rocket to fly on five separate orbital-class missions.
Back on March 14th, Falcon 9 booster B1048 technically became the first SpaceX rocket to successfully complete five orbital-class launches, although an extremely rare in-flight engine failure came close to prematurely ending the mission and fully precluded a successful landing.
While the ~$2M in revenue SpaceX likely generated with the rideshare doesn’t come close to recouping the ~$25M spent on each Starlink launch, the cumulative value of 10-15% savings over dozens or hundreds of launches will be far more substantial than it might seem at first glance.
Regardless, Falcon 9 B1051, 57 Starlink satellites, and two rideshare passengers are scheduled to lift off from Kennedy Space Center (KSC) Launch Complex 39A no earlier than (NET) 11:59 am EDT (15:59 UTC) on July 8th.