It’s marketing, but in a global good will sense of “look how much OpenAI cares about secure open source.”
This works for established profitable brands that want to build / maintain a good public image.
This isn’t the marketing needed by an unprofitable startup that wants to show hyper growth before its IPO. They need the “use our product or get pwned” kind of marketing.
If OpenAI cared about open source or security, they'd give access to open source projects directly. But they don't:
https://openai.com/form/enterprise-trusted-access-for-cyber/
"Daybreak enables vetted enterprise customers and cybersecurity practitioners to use our most capable models for dual-use cybersecurity work."
They explicitly give out access to those who will make a big announcement of bugs found. OpenAI does not want projects to fix bugs themselves so it can have more bugs and better marketing.