No its not you, I noticed the same thing.

When looking at their websites, obviously most of them are not interested in our community, but only registered to get some traffic.
I doubt its a script though. Because, if that were the case, we would have seen a lot more registrants per day.

It is very likely though, that with the new PGDev we will clean up the database and remove all users that either have not logged in for an x amount of time or who have not participated in forums at all.