Why would someone give this sort of clues?

http://inthemix.com/news/hardwell-nobody-knows-i-ghost-wrote-a-current -beatport-top-ten-hit/12788

Many producers have admitted to ghost producing, but Hardwell even gave clues about a track he produced for someone else telling the interviewer that it was in Beatport's top 10 at the time of the interview. What was he trying to achieve, exactly?