Well it's basically saying, just give us the money. The "audit rights" only apply if they're donating time, so they want that to be the most difficult and intrusive option -- ie., its only there for PR.
The choice is, "some money and we'll look the other way; or open all your books, and donate 8% of your workforce to wordpress"
Attempts to go fishing in such records would be pretty unlikely to succeed; it'd be an uneforcable request contrary to public policy, with no relevance to such an audit. It would be correctly and easily fought.
"Automattic will have full audit rights."
"WordPress.org and Automattic will have full audit rights, including access to employee records and time-tracking."