Hi Justin! Ben here, co-founder of Wren. COTAP is a great organization, and the non-profit filings are a good, fundamental way to verify that they exist and are doing what they say. In response to why Wren, our philosophy is that most individuals—perhaps most of you on HN excluded—don't spend the time to figure how to contribute to stopping climate change, let alone carbon reduction projects, and certainly don't spend additional time following up on the additionality and usage of their donations. On top of that, there is a great opportunity to stitch this community together and create a place where ideas can be shared around climate reduction, projects can be supported in tandem, and ideas can be brought forward for how to reduce your carbon footprint. We're only a few weeks old and a lot of this is ambition, but our goal is to expand upon an individual's initial excitement around doing something about climate change.