Here's a legitimate question that I'd like to know the answer to. How many petitions on the White House petition site, regardless of the number of signatories

Here's a legitimate question that I'd like to know the answer to. How many petitions on the White House petition site, regardless of the number of signatories have resulted in a direct change to US policy, in favour of the petition? I think people should be getting more peeved about the answer to that question than the number of staff writing non-responses to them.