Well I'll be logging off this site, as sadly I don't believe BE's explanation for the old threads. I know that you can do a search and it will bring up old threads, I just find it extremely odd that of the 10 "busiest" threads on the navigation bar, 7 of these are old threads. To me this says that the site is not getting the activity it used to, and BE is bumping these threads to generate more interest.
I have my notifications set to email me when any of the threads I am following are commented on, yet since I started questioning the strange activity with the old threads, my notifications have stopped - to me that speaks volumes.
I found this site a great support when I had my first baby, but I'm calling it a day now as I think BE are not being honest.
NTT xx