Ask HN: Is there a "groupon" for web sites?

I have been trying to get users for my music newsletter, sonsgp.in and I was thinking that offering some kind of groupon-style half price deal might be a good way to get a bunch of subscribers. AppSumo is the only site I know that does groupon like deals for the web, but it's more for developers/geeks. Is there another site that offers deals for web sites / web apps?