You never pay anything and you don't have to change how you surf. Basically, you earn income while you browse the web in the normal way - except adverts are being displayed in part of your screen. A huge number of companies like UtopiAd and Epipo. All Paid For, DotAd, SharkHunt and Desktop Dollars. The professional quality of their website.
First impression counts.
The quality of the website tells us quite a bit about the company. A well organized website with an attractive design means they have the financial resources and manpower to run the business. The availability of their software. GotoWorld had their software available for download from the start. So if they can't get enough advertisers or members, they can simply say sorry and shut down the business without any liabilities.