I don't mind the look either. I don't mind B & W sites. (I am partially color blind, so maybe that's a factor?). Even with photography, most of my pictures are in B & W.
I wouldn't pay $15/month. I would accept one targeted ad per week? While I won't use this service, I need to know how it works. I have a weekend project?
This sounds like a useful service that fits in an area where Google Voice totally dropped the ball and Burner hasn't gone yet.