- To make the world a better place! The model has helped us be happy and make a positive impact in the world, and publishing it may help others do the same. - Open-sourcing it is a fun social experiment, we’re curious about what’s going to happen :o) - By making our model public, we’re more likely to keep it up-to-date and improve it as we learn. - Putting it on GitHub makes it easier for others to clone and evolve the model, and we can learn from that.