That phrasing in the Dec. 15th WT is really strange. Especially the part specifcally targeting the "faithful apostles" as an example of who is anointed.
I noticed that reference as well, so perhaps that leaves the door open for the GB to actually stick to a literal 144,000, but excuses the increasing number of partakers. All they have to say is:
"The light gets brighter TM . Those in the 1st century had the understanding that they ALL had the heavenly hope. However, over time Jehovah's spirit revealed that, in fact, it was those he'd entrusted with oversight of the Christian congregregation while on Earth that would also be anointed to serve as co-rulers in heaven. Those overseers would humbly recognize that their short time on Earth shepherding their fellow Christians would in fact act as preparation for their heavenly assignment of co-ruling with Jesus during his Millenial Reign. Millions of true Christians live during the last days of this system, certainly many more than the thousands of faithful Christians in the 1st century. Logically, Jehovah's perfect rulership would recognize that Jesus' "co-rulers" should proportionally represent those faithful Christians on earth-- each knowing what trials and pressures his contemporary fellow Christians faced. What a loving provision from Jehovah! As it was for modern-day Christians who first realized their hope was earthly and not heavenly, how rewarding it will be for those non-anointed faithful 1st century Christians to be resurrected to a Paradise Earth, knowing that a few of their 1st century brothers are watching over them in Heaven!"