How a seat actually gets assigned

A common assumption is that a private seat goes to whoever pays the most. It does not. Every APSIS flight is a research flight first, and the manifest is built backward from the science it carries.

The payload sets the orbit

The experiments decide the altitude, the inclination and the duration. Only once the mission profile is fixed do we fit the crew to it, matching training timelines, medical clearances and the balance of skills the flight needs. A passenger is assigned to the flight that suits them, not the next one with an open chair.

Why this is better for everyone

It means no flight launches half-empty of purpose, and it means the cost of crewed access keeps falling because the science pays down the vehicle. The passenger gets a real mission with a real reason to exist. We think that is worth waiting a few months for, and most people, once we explain it, agree.