This is a pure B2B maneuver. OpenAI understands that corporations won't buy a "naked" API; they need integrators who will rebuild business processes for agentic AI. By bringing in the "Big Four" as sellers and implementers, OpenAI guarantees massive commercialization of its platforms in the enterprise segment, leaving the dirty work of customization to the partners.
Source: OpenAI
B2BOpenAIConsultingEnterpriseAgents