"click to donate" button

How exactly do "click to donate" buttons work on websites like http://www.care2.com?

How is money generated? Is it just clicks that is the main source of fund开发者_开发百科s?

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I suspect they have some sponsor that pay for X amount of clicks each month. Usually these sponsors are companies, but also private persons sponsor sometimes

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If you want to collect donations on a website then you could use a PayPal donation button.

https://www.paypal.com/us/cgi-bin/?cmd=_donate-intro-outside

You would then receive the donations into your PayPal account.