It's funny, I had jokingly wondered recently as to what they would do if the number of partakers grew larger than 144,000.
The problem with end-times groups is that they tend to set doctrines, policies, and expectations based on the idea that the end will arrive soon. Over time, some of those teachings become untenable and must be modified or discarded, but the core idea of the end being near must not be abandoned. Many times, they go from a strict interpretation to "it's a conscience matter" or "we just don't know." The results are sometimes comical, and sometimes tragic (the stance on blood transfusions is an example of the latter).
When the number of partakers began to stall --and even increase-- they had to do something about it. So they said "it's not for us to say." The number really ballooned after that, and must be a constant source of frustration for them. So it doesn't surprise me if they say "new light- it's a symbolic number." But now, watch for the number of partakers to increase quickly and substantially over the next few years. The next step would be for them to stop reporting the number of partakers, once they realize how bad it has gotten.