Some ISPs, however, have refused to augment their networks UNLESS the content providers they connect to agree to pay them to do so. Viewed in the light most favorable to these ISPs, they want content suppliers to pay not only for their own increased costs of supplying more robust Internet content, but also for any increased network costs of the ISPs too. This is not only unreasonable on its face, but it is entirely inconsistent with published reports indicating that returns on invested capital for ISPs are excellent, and are expected to improve even further, driving considerable additional growth in economic profits. More cynically, these ISPs simply view these arbitrary tolls as new sources of revenue for their last mile bottleneck monopolies or as a way to unfairly discriminate against content that competes with the content the ISPs themselves supply.