the merger agreement is clear. the only thing that can free elon from completing the deal is lack of regulator approval and no regulators are even looking at the deal
Twitter might let Musk off the hook for $1 billion, but he's paying something to get out of this.
1) Requests for information are assumed to be to facilitate _closing the deal_. Its not just for any willy-nilly request he wants.
2) It specifically is not to service "due diligence". This is the "open for interpretation" part. The contract _separately_ calls out that Musk has had the opportunity to seek information for due diligence, and Twitter has already fulfilled those requests to his satisfaction. So with that in mind, I would interpret the obligation to service information to be limited to things e.g. related to acquiring financing, or to fill out paperwork etc.