The Wall Street Journal, for example, charges a simple flat fee for a monthly subscription. The World Broadcasting Network licenses multimedia products of use to businesses. Individual Inc. offers customized information deliverable over the web or using other network services
Alternatively, a fee might be charged only after an actual access. This "pay per view" revenue strategy requires the accumulation of microtransactions, which are exchanges involving very low prices for the right to see individual pages, or to issue certain commands.
The goal of Digital's Millicent Service is to create an infrastructure for these tiny transactions. But will consumers balk at having to make lots and lots of microdecisions? In any case, the most prevalent revenue model by far is advertising.