However, these services are also considered inferior to the corresponding ones by airlines in the following points: They are for member card-based ones mainly for business customers, and since each JR company operates its own service system independently, a member of a JR company cannot get a ticket nor a discount ticket of another JR company, and therefore, the services are considered exclusive ones.
しかしながら、主にビジネス客向けの会員カード制である点や、それぞれ各社が独立して運営しているので、JR同士であっても会社が異なると発券や割引が受けられないといったことが起きている点は、閉鎖的なサービスとみられ、航空会社のそれに比べると劣っているともいえる。