As the article you cite notes his "record" is tainted by including match results (they're easy to fix, esp among friends and acquaintances) so maybe Nip quit playing chess because he wasn't really that good BUT after looking over his USCF data the evidence appears to be open to debate either way.
If the record is legit with a DOB of 1998 he has plenty of time left to change his mind and start playing again; it strikes me as fishy that if he's for real he would've quit within a year of becoming a master
https://nezhmet.wordpress.com/2008/03/10/the-fabulous-00s-something-to-nip-in-the-bud/
http://main.uschess.org/msa/MbrDtlRtgSupp.php?13062538
http://en.wikipedia.org/wiki/Nicholas_Nip
Since accomplishing the record, Nip no longer plays chess, and due to his inactivity no longer appears on the bi-monthly top 100 lists for his age.
Playing chess only to break a stupid record and then leave it...