Like Juan i don't think there is any bias in the system towards favoring any particular photographers.
However it is far from a fair system.
A photo which is uploaded at 2355 gets 24hrs and 5 mins coverage on 24/48 while a photo which is uploaded 10 mins later gets 47hrs 55 mins coverage.
How is that a fair and equal system.
Now if this site didn't push the whole concept of hits so dramatically this wouldn't really matter but the site does.
With top of the day,top of the week,top of the month everything depends on initial success on the first day and a large part of that comes from the upload time.
I have seen numerous outstanding images dissappear into the abyss of the DB
because they where unfortunate enough to be uploaded in the last few hours prior to rollover.
I really cant see why a photo cannot sit on the 24/48 page for 48hrs after upload and then it is automatically removed.You could even get rid of the 48 part and just have it a 24hr page rather than a 24/48 or have both.
Fair and equal as every photo spends 48hrs on the 24/48 page.