I think it would be charitable to assume the author meant "fulfilling" by "cool stuff". I am looking for a company right now that fits into either "cool stuff" or "positive impact" but the latter is FAR more difficult to find. There are plenty of "positive impact" SaaS companies around pedalling meaningless Corporate Social Responsibility platforms (what even is a tool that legitimately helps with this?), but nobody using software to make a meaningful impact on the world - possibly because it's rarely a software problem.