As long as it doesn't need near-real-time viewing (or if it does, said viewing can be billed for as a separate per-user fee), it wouldn't cost anything extra to

As long as it doesn't need near-real-time viewing (or if it does, said viewing can be billed for as a separate per-user fee), it wouldn't cost anything extra to SpaceX in the sense that those cameras could use free capacity, only transmitting when nothing else is.