@ Band on the Run, who asked,
Did they just have new light and as of a certain date, you were encouraged to suddenly be a remnant member?
No, it isn't encouraged to be a remnant member, but the number of partakers at the memorial is increasing. I'm going to copy and paste some information from my notes here. It shows the difference between what used to be declining numbers of partakers, and the now increasing number of partakers, and the way the Society responds to it.
(Latest View of Memorial Partakers and The 144,000)
One change is in the way the Society looks at the number of partakers. The declining number of partakers was supposed to be proof positive that we are in the last days. Under the subheading 'Six Convincing Lines of Evidence [of being in the last days]', the following article says,
"Sixth, the number of genuine anointed disciples of Christ is dwindling, though some will evidently still be on earth when the great tribulation begins. Most of the remnant are quite elderly, and over the years the number of those who are truly anointed has been getting smaller." (Watchtower Jan 15, 2000, p 13)
-- and --
"There is every reason to believe that the number of anointed ones will continue to decline as advanced age and unforeseen occurrences end their earthly lives." (Watchtower Aug 15, 1996, p 31)
However, in recent years the number of partakers has increased significantly. Obviously, the declining number of partakers proved nothing regarding the last days.
Another change is in when the number of 144,000 was sealed. Previously it was viewed to be in 1935. The organization said,
"Logically, the calling of the little flock would draw to a close when the number was nearing completion, and the evidence is that the general gathering of these specially blessed ones ended in 1935." (Watchtower 1995 Feb 15 p.19)
-- and --
"There is good reason to believe that the number of 144.000 anointed Christians was complete decates ago...The facts over the decades reflect both the completion of the calling of the anointed and Jehovah's blessing on the growing "great crowd," who hope to survive "the great tribulation."" (Watchtower Aug 15, 1996, p30)
The reason for looking at 1935 as though it was the year the 144,000 were sealed, is that it was in that same year that the 'other sheep' were explained to be ones with an earthly hope. It was assumed that since Jehovah provided the "new understanding" of the 'other sheep' in 1935, it was because the 144,000 must have been completed in that year.
But because of the increasing number of partakers in recent years, the Society is forced to take a step backward in the 1935 date, and it now says,
"Thus it appears that we can not set a specific date for when the calling of Christians to the heavenly hope ends." (Watchtower 2007 May 1 p.31)
And what about all those new partakers? The Society suggests that some partakers may be emotionally unbalanced, or are influenced by past beliefs, and are partaking by mistake.
"...A number of factors — including past religious beliefs or even mental or emotional imbalance — might cause some to assume mistakenly that they have the heavenly calling. We thus have no way of knowing the exact number of anointed ones on earth; nor do we need to know." (Watchtower 2011 Aug 15 p.22)
Like so many Watchtower beliefs, this one is a state of flux, and there is confusion all around.