... The other 25% is used to cover the cost of running my websites.
I gave this weeks of serious thought. My wife and I have been giving at least 10% of our gross income to charity for the past decade. We feel very blessed. There are so many people on the planet who need help. I can tell you personally that our favorite checks to write each month are the ones that go to charitable organizations.
No it is not. We are not a not-for-profit organization. I do this site and my two other sites as a hobby. I have a day job. I really do not have any desire to also do all the work that is involved with running either a for profit or a not for profit business. I have had my own business in the past and I can tell you it is a lot of work!
navtango.com is new. I have been running the other sites since 2007.