Edit: Yes (no guarantee), but you must also first do: chmod u(plus symbol)x script.txt to make the script executable. (dang forum software deletes the plus)
You can also, if you want, locate the script.txt somewhere else, like in /home/user/bin or something, so it will not be web-accessible.
10 20 * * * /home/user/bin/script.txt
[color=#00CC00]ANONYMOUS0 => Max Discount[/color], [color=#6600CC]ANONYMOUS2 => Max Discount less $1[/color] or Cut the code, [color=#CC0000]it's their birthday:[/color] [color=#00CC00]9999 => $99.99 Off[/color]