Because the XT stands for nsa-eXTensions.
No really, Hearn is a joke, has been consistently working to weaken bitcoin
since 2013.
In any case nobody gives a dime about XT:
https://bitbet.us/bet/1191/the-hearn-gavin-scamcoin-will-fizzle-in-2016/
But they are still trying to push the hardfork and other assorted shit in
BIP100/BIP101 etc.
On Tue, Aug 18, 2015 at 11:07 PM, grarpamp
http://lists.linuxfoundation.org/pipermail/bitcoin-dev/2015-August/010379.ht...
https://github.com/bitcoinxt/bitcoinxt/commit/73c9efe74c5cc8faea9c2b2c785a2f...
Bitcoin XT contains an unmentioned addition which periodically downloads lists of Tor IP addresses for blacklisting, this has considerable privacy implications for hapless users which are being prompted to use the software. The feature is not clearly described, is enabled by default, and has a switch name which intentionally downplays what it is doing (disableipprio). Furthermore these claimed anti-DoS measures are trivially bypassed and so offer absolutely no protection whatsoever. ...
-- Brenda Fernández me@brendafernandez.com GPG: CE5BEE6C81FCA4D4 http://pgp.mit.edu/pks/lookup?op=get&search=0xCE5BEE6C81FCA4D4