Rikki Tikki Traveller
Cosmic Mongoose
The Highport and a corporate-owned Transfer Station are different things.
The Jump Train might decide that it is more efficient to go through a poor quality starport system. Rather than upgrade the imperial starport, the Megacorp finds it more 'efficient' to build their own facility. No one else can use it. Free traders would have to go past this huge, shiny high-tech Class B private starport with a dozen ships docked and land on the planet with it's Class-E starport...
The Jump Train might decide that it is more efficient to go through a poor quality starport system. Rather than upgrade the imperial starport, the Megacorp finds it more 'efficient' to build their own facility. No one else can use it. Free traders would have to go past this huge, shiny high-tech Class B private starport with a dozen ships docked and land on the planet with it's Class-E starport...