Well, in this case the FWE will be payed by you to push you spending more money so the ceo is being able to brag that they are working with openai (instead of mckenzie)
Surely the various contracts are pricing in the salary for the FDE, as a feature. "Not only are we giving you terrible software that is impossible for outsiders to learn and operate, but we are also installing a double-agent in your organization who will ensure you don't migrate elsewhere. Pay up unless you want to lose out on the AIs."
There might be other motivations but at least thats how the term differenciates.
For OpenAI having more companies using OpenAI and buying tokens etc. helps them and they do have a typical issue: they can move as fast as they want, if no one else is moving with them...