I also agree that getting large companies to agree to use the standards will be hard, but there examples of them adopting other standard contracts:
Here's Bank of America entering into the ISDA Master Agreement for financial derivatives https://www.sec.gov/Archives/edgar/data/1065696/000119312511...
and Disney using the IAB Standard Terms for online ads https://disneyconnect.com/dpep/disney-ad-guidelines/
We've already seen our users closing deals with Fortune 500 companies using the standard contracts, but we have a lot more work to do on that front.