Apparently there is something happening with NG, otherwise Tom wouldn't even consider this. I can understand that NG is not at the peak of its success anymore, I feel like that was around 6-10 years ago (I could be wrong though), everyone visited that site back then.
It's just that with sites like Youtube things have gotten much easier. Honestly I don't even know if Flash has such a great future. Sure you can make animations, but you can also make those differently and publish them on YT. And if you can make games, why not sell them in the App Store or something...
I personally don't really know how you could make NG grow more and it saddens me because NG always had more soul than let's say YT that is run by faceless people that know nothing about their community.
Perhaps you could offer additional features, like videos, photos, blogs, even though it is questionable if people would really want to visit NG for those reasons.