virtual economy has been offline for 24 hours and all user-made ads run for only 24 hours
because it's offline, players can't bid on their own user-made ads
the BC ad is a default ad that shows when there are no ads running
Builders Club ads are automatically ran, they will run behind the other ads, they are set to popup every so often but due to the economy being down they have also taken down advertisements and I believe sponsors too.