From CyberWurx Customer Wiki

Minecraft Advertisements

To use this feature, simply log into your server's FTP and open the file called adverts.txt

If you have not used adverts.txt before, it will be a blank file.

The adverts script will pick a random line from adverts.txt every 10 minutes and display it on the server. The way it works is plain and simple. Add your advertisements in adverts.txt line by line. Each newline counts as a new advertisement.

Example adverts.txt file:

Welcome to the minecraft server!
For more information about our server go to http://cyberwurx.com/
Remember to follow the rules.

The adverts script will choose one of those 3 lines to display on the server. Remember, you may get the same advert several times in a row. That is just the nature of random selection.

Colored Text

Your adverts can be a different text color! Simply place a § and the color code before your text.

For a list of color codes, go here: http://wom.thatgamer.com/colorguide.php remember, on your server use §, not &.