To be fair to EFF, it is explicit about what it considers that strong commitment to be: publishing this DNT policy notice on the domain:

https://www.eff.org/dnt-policy

Quote:

What does the dnt-policy.txt promise mean?

Posting the dnt-policy.txt file makes a promise to the users who interact with their domain. We [EFF] believe it would be a false and misleading trade practice to post the policy without the intent to comply in good faith. However, EFF is not in a position to enforce this promise or monitor compliance.