Every day I click on all of the donation buttons for the Animal Rescue Site, and their related sites.
I also do Freekibble.com and Freekibblekat.com.
Yes, it's important to make sure you know where your money is going when donating cash, but as another poster said, the clicks bring donations from sponsors.
People magazine just had a great article about freekibble.com. It was started by a 12 year-old girl. Way to go!!