Availabilty: The program is open to residents of all countries. However, their services, including their search engine, currently work best for the USA and primarily focuses on USA results.
Their Reasons: Advertising to get new users costs a lot of money so they primarily pay you so you use them, plus they'd rather give the money to you than gamble it on advertising. Also, they think that the huge profits made on the internet should be shared with the users that are helping make that happen. Lastly, they help us make money so they can create more jobs and donate to charities.
They strongly believe in philanthropy and donate a percentage of their income every month to various charities. This does not come out of your earnings, they donate after we they paid all of our members. The charities they donate to and the percentage changes every month so they do not publish a list. If you have a specific charity that you would like to see us donate to, just email us and thet will consider it. They do not have any kind of voting system at this time. If you want the money you earn to be donated, they have decided to pay you and let you handle that on your own. There may be tax benefits, etc. so you should do this on your own.
Either you can help yourself or to the charity while you are surfing by participating their programme. Earn yourself some spare cash while when you are on the internet. All you need to do is surf normally.