I have a product that's interested for all the artists on soundcloud, myspace, reverbnation and bandcamp etc. Please contact me (PM or post here) if you're interested. You need to work 100% whitehat and you need to make already money. Basically its promoting the product to these people, no matter if it is via email marketing, twitter or adwords. We split profits 50/50 (you will get your own account where you can track the clickthroughs and sales).