I guess that these shoes were dismissed by their owner. Job well done, you're free to go now, or something like that.
I found them on the street the other day. Its very common here in New York to move the stuff that you don't need anymore to the street. If you want to get rid of some books you've read, you just put them on top of the trash can. Do you have some left-over clothes? Put them on top of the trash can. Most likely someone who can use your stuff will walk by and take it with him/her.
Have a great weekend everyone!