I would happily bet that > 50% are already doing just that. Whether you'll be able to collect the data is another thing but they'd be fairly stupid if they haven't at least checked out what is available. It would be next to irresponsible not to do so and given that they're in the S&P 500 you would have to at least give them some credit.

We already have data! Look at market share measured by tokens not revenues.