Thank you for the correction. Why did Virgin Orbit choose to develop and use a different launch platform (LauncherOne [1], it seems) than putting effort behind

Thank you for the correction. Why did Virgin Orbit choose to develop and use a different launch platform (LauncherOne [1], it seems) than putting effort behind Galactic's SS2 platform? [1] https://en.wikipedia.org/wiki/LauncherOne https://en.wikipedia.org/wiki/LauncherOne