I'm certain Leupold will make a bundle on the filters, however there are times when a certain color will allow you to see, a little later in the evening, or a little better on overcast days, or just to keep the rain off, who knows. I haven't bought them yet, maybe never who knows, It's just like most "extras" we put on our weapons, ya don't need em', but sometimes it's just fun.
By the way I finally got my 6.5-20x50 LRT varmint reticle a couple of days ago. It's sighted in, and I love it. Thanks, Mike