I mentioned the very same thing a few months ago.
The present NEWEST MEMBERS thingie will have a very limited appeal.
Most sign-ups will probably be male, and I wouldn't want to see thumbnails of all the latest males.
Instead, people will want to see the latest sign-ups of people that might be of interest to them.
For me, for example, I'd prefer to see the latest female sign-ups, aged 30 - 45, from anywhere. Or at the very least, the latest female sign-ups.