Hi Michel
Might be time now for a bit of history on this feature.
Misha started it back when he was a mod.
I continued it.
 I believe he just picked the ones the wanted, and would sometimes put more than one image per member in.
His idea for this was very good, and it  was fitting that it be continued.
We were trying a different criteria by selecting images that had not recieved a lot of comments, but deserved them.
This is still true.
But other criteria used, is adding some images from members who are participating in the forums, those who are regularly active in galleries, and those who do outstanding work. It would be nice to select more, and have all varieties of genres, but we do have to heed the TOS, and nudity guidelines as this i -frame is not filtered.
To not include images that have a lot of comments does  not work for me personally.It is because of these members that the site goes so well, so any and all recognition is proper for them.
There has been quite a few new members who do outstanding work  tha start joining in  on the forums just because  of the memeber nitification we do.
Basically I think we have it all covered in this feature.

Oh yeah Michel....lol... there is sometimes when I know i just click on a page and the first image that comes up is the one I choose, so there you have it, some are indeed random.
 Your suggestion could work for a few, as now we have 3 staff working on this.

"The happiness of a man in this life does not consist in the absence but in the mastery of his passions."