Its technology allows journalists, publishers and bloggers to earn revenue from the products they write about, if their readers then click through and buy that product.

Negotiate hard on final price but be conscious that an underfunded service provider will always be looking to earn revenue in other ways or escape from the contract.

The words 'universally accessible' carry the implicit threat that nobody can actually own or earn revenue from any information since it will all be just out there.

These startups are usually in the very early stages of development and often have yet to earn revenue.

This principle allows greater evaluation of actual profitability and performance (shows how much was spent to earn revenue).