Feels bad when the artists signature takes away from the aesthetic beauty of the piece, but if they don't put it, the art can just easily be stolen so you are sad mix of disappointment and understanding.
I feel you and all I can do is apologize. I’m really, really sorry. Sadly this is the only way I feel less exposed. Art thieves made me leave once in the past, nowadays I try to not discourage myself; I really want to share w yall my stuff!
I wish someday artists won’t need a watermark anymore. Someday😊