The "most popular" answers itself - they may be old B&W images but some would say that the ships were better looking in those days so do have merit. As the thumbprints are better on this new site you can view the photos quite well without opening them, hence the lower number of hits.
My complaint is that when you open the site, the only images you see ate the top 4 and you have to dig deeper to see anything else.
The Top 4 keep getting views and nothing else has a chance to be seen until they finally expire.
I don't understand how old B&W images can get 40 hits only an hour or two after uploading, when wonderful contemporary images struggle to get 20 views in 24 hours.
Perhaps there are a huge number of members who have little interest in coloured images and seek out the ancient ones?
But that doesn't matter.
What does, is that the website in its current form hides almost all other images that are being uploaded and doesn't give them the exposure they deserve.