No incentive. If your service is used through something else then you are easily replaceable and users don't spend time in your app. edit: Just to be clear, I'

No incentive. If your service is used through something else then you are easily replaceable and users don't spend time in your app. edit: Just to be clear, I'd love that too. Hopefully it will start happening when everything is driven more by micropayments rather than ads. I'd imagine you'll have "gui companies" and "service companies".