I could be wrong here, by my modestly educated guess is - in addition to some pure cold calling salesmanship - he has connections with certain labels, mgmt groups, artists, etc which lend themselves to opening doors to projects which are possible candidates. I doubt there is much going in the other direction, i.e. artists, labels, etc reaching out to him. And to be honest, SDE is just a pimple on a gnat's behind. It's likely mostly unknown. Plus physical digital discs - particularly BD-A - are an afterthought in most of the industry (although there are certainly some exceptions).
While he's not a surround guy (at all), if you want some real world insight into how these types of projects go, read Shane's post on the lengthy Intervention Records thread over at the hoffman forums. It's not remotely as easy (on many fronts) with artists and labels as most like to think/hope it is.