Quite helpful, thank you!
This was an interesting rule on United's website, Ithought those points were not given if you cancelled flight:
What happens if I change or cancel my flight after purchasing?
All Award Accelerator and Premier Accelerator purchases are nonrefundable. You'll be able to keep any miles or Premier qualifying credits you've purchased even if you change or cancel your trip. This also applies when your flight is rerouted or interrupted due to conditions outside of your control.