Thank you. Very much.
It automatically makes any tileset so much more attractive. Especially if the creator takes care of setting the density of tiles and all that stuff.
I can guarantee this will get you sales since for some reason it's a rare thing for people who sell tilesets to do this.
Not everyone is especially creatively gifted with building maps and so having a tileset that already has maps built for it gives you some ideas. It makes it easier for you to create your own maps.