I can’t say that I’ve particularly analysed the offers that come through in Battersea, but equally can’t say I’ve particularly thought they weren’t relevant (and we’ve used a couple). One of the ways of building that critical mass – and I am guessing at a business model here – is to use those businesses as an incentive for people to sign up and use the site. Of course, that’s reliant on there being an overlap between the (potential) clientele of the businesses doing it and the people signed up for Streetbook.