If the applications being created are very small, e.g. in a few hours or days, as is the case in the content creation industry (for websites), small sums of mon

If the applications being created are very small, e.g. in a few hours or days, as is the case in the content creation industry (for websites), small sums of money work. Websites are running on adsense, 1 dollar for every thousand page views (uses of the site). As for trust, a third party can run the application and meter use (as in amazon ec2 and payment system), and besides, if a user doesn't pay or a provider doesn't give quality product, you will withdraw your offer from that person pretty quickly. As examples, affiliate systems like commission junction, clickbank, adsense are working.