You think the Adobe never built any bad links? I know many such large companies that are spendings hundreds of thousands of dollars a year or more buying links.

Do you have a link to the API, please? Thanks!

Custom Search, Don't specify any rules which would interact with the results you are testing against. (like add a rule that favors a parked domain.)

If they are buying those links then finding the bad ones is as easy as contacting the people they cut checks to.