I like those boxes! Pretty cool actually! I understand why you feel you don't need so many. I would use all of them in my yard and be quite happy about it!
They are much more attractive looking than the ugly buckets I use. You could grow sweet peppers, hot peppers, lettuce, dwarf eggplant, radishes, carrots, bush beans, or lots of flowers!
If I lived closer, I'd come purchase a few off of you! Can you add two of them, one on each side of your walkway or front door step and fill with flowers to greet visitors?