The Forbes article With A Successful Launch, OneWeb Just Joined SpaceX And Others In The Satellite Internet Race says:
This marks a turning point in a new generation of communications satellites, which backers say will provide high-speed internet connectivity to the billions of people who still lack access to it. OneWeb joins SpaceX as the second company in this new generation of internet satellite to actually put spacecraft into orbit.
If OneWeb asked SpaceX to launch their internet satellites which compete with SpaceX's planned internet satellites, it might be in SpaceX's interest to say "no" and force them to go with a more expensive carrier, and to avoid the optics.
Question: But since SpaceX operates in a highly regulated niche within the already highly regulated transportation industry, would they be able to simply say "no, your money's no good here" or are there regulations that would requite them to treat all potential customers in a similar way?
I'm not asking if they could find a way to torpedo the deal or shuffle the schedule to OneWeb's disadvantage, I'm asking if they can just say no.
I'm looking for fact based answers, and those can include facts of laws and factual anecdotes where this issue may have already come up.