If I work as a reasonably successful IT entrepreneur (I don't think I am going to be Gates, Brinn or Zuckerberg). At most I will be able to give away few million to charity/philanthropy. That is going to have a relatively limited impact. International development funding is $130 billion / year.

Taking my skills and helping spending those $130 billion sensibly, by applying my skills is having a considerably bigger impact, I think.

My team is routinely involved in country level data-to-decision work around things like drinking water supply, sanitation access, food security, agriculture efficiency, climate change adaptation, disaster respons etc. If I add up the population of the countries where we our tools are used for rural drinking water mapping and prioritisation of investments, we end up with about half a billion people.

For me, the best way to use my time I think is helping others by applying my skills to the problem at hand. Working for a faceless shareholder (mine and your pension fund and a bunch of rich people) on something that may be technically interesting, but didn't make a big positive impact on the world and the people in it, just wasn't enough for me anymore. What I do now is more satisfying and has a much bigger positive impact, I think.