Im not sure what you guys are talking about but YG is the most liquid mini gold contract. It was bought from ECBOT. I trade it along with GC in different accounts due to size of equity in account.
It is definitely tradeable.
JLN Metals Scorecard 9-Dec-09
NYSE LIFFE US Total Volume 29,279
100 oz. Gold Futures Volumes
NYSE LIFFE US 6,212
CME/NYMEX (Globex + PNT) 264,570
CME/NYMEX Open Auction 3,103
NYSE LIFFE market share 2.27%
NYSE LIFFE US Electronic market share 2.29%
100 oz. Gold Futures Open Interest
CME/NYMEX 501,857
NYSE LIFFE US 2,896
NYSE LIFFE US market share 0.57%
Mini Gold Volume
NYSE LIFFE US 15,809
CME/NYMEX miNY 770
CME/NYMEX E-mini 96
NYSE Liffe market share 94.81%