Can anyone tell me why I would want to pay $25 to submit 5 photos to an "externally juried exhibition"?

There's a local gallery doing some kind of showing in the fall and they are looking for photographs to go along with a poem. You can find the details here: One_Art_Elizabeth_Bishop_Centenary - ViewPoint Gallery

What I can't figure out is why I would want to do something like this. There doesn't seem to be anything in it for me other than an opportunity for people to see some of my photos. Why would I want to pay $25 for this when I can post them here or on Flickr for free and provide an opportunity for many, many more views?