Sal means that the factory that produces the Robin doesn't, or can't, work with bd1. They probably don't have the equipment necessary and don't want to invent in it. Just because spyderco uses the steel in their knives doesn't mean it's possible to use it in any knife.
Spyderco : Resilience, Tenacious, Persistence, Manix 2 G10, Manix 2 LW, Para 3 G10, Para 3 LW, Paramilitary 2, Sage 5, Amalgam
Kershaw : Tone, Cryo, Cryo 2, Thermite, Atmos, Natrix 7007cf, Natrix 7008cf, Bareknuckle 7777, Concierge
Zero Tolerance : 0566CF, 0770CF, 0770GRYBW, 0562CF, 0470
Ontario : Rat 1
CRKT : Caligo
Civivi : Plethiros, Baklash
Cold Steel : AD10