How come this is signed by OpenAI engineers while OpenAI participates in it with DoW? https://x.com/sama/status/2027578652477821175 https://x.com/sama/status/20

How come this is signed by OpenAI engineers while OpenAI participates in it with DoW? https://x.com/sama/status/2027578652477821175 https://x.com/sama/status/2027578652477821175