amx_scrollmsg ?

you can find it in your amxx.cfg file.

// Frequency in seconds and text of scrolling message
amx_scrollmsg "your text here" "time here"

example:

amx_scrollmsg "www.myJUMPs3rver.com" 600

And what does this command do?

There's a moving text at the buttom of your screen showing the message "www.myJUMPs3rver.com" every 600 sekond.

it's automatical enable