Why? The songs are special to one person. They are generally stripped down acoustic tracks with low production.
I got my gf one a few years ago, and we both enjoy it for what it is, but I can't see anyone else really wanting to listen to it.
It's something to have as your own.
Usually a song is written by the Artist that is special to themselves or someone they know. Fans love those songs. The songshop song would still be enjoyable music from an artist they like. I can totally understand keeping to ones self but just figured some people would want to share the love.