A friend of mine is using your tiles for a game. Until I saw screens from it I had no idea that these tiles looked so nice. I don't think your previews are showing them off to their fullest. You might want to have a few previews that are easier to see the tiles in, maybe jpged if you're worried about people just taking them.
Oh, dear. That would be me! I'll happily share the project once it's finished. It's just a small, basic thing in RPG Maker to show people that a game doesn't need to have 1000+ maps to be decent, or even playable, so I'm making the entire game in a single map. I'm finding these tiles to be quite versatile, with pretty minimal modifications, and I'm using Open Game Art characters.