Because sponsored links are the single biggest source of revenue on the web!
It's a $200-300 billion market, with Google owning more than 90% of it.
If just 1% of Google users switch to KARMA, it will fund the actions of its non-profit partners to the tune of $1 billion per year!
Switching is free and effortless, it only takes a few seconds...
Seems like a bit of confusion of purpose. Why would I not use the search engine that gives me the most useful search results, and then, unrelatedly, just donate to an organization like the World Wildlife Fund if I care about protecting biodiversity? It seems strange to link these things together.
