Our goal at Really is to build world-changing systems that benefit the lives of many. We don't believe in hoarding or owning data - we feel our value comes from allowing individuals to share their data with us, and together we can divine information from it that leads to better life outcomes.
We approach our development efforts in this way too.
Where ever possible, non-critical components of our platform will always be shared with the greater community. Some of them may be too specific to be of value to anybody but us, and others are already proving to be valuable to hundreds of thousands of people.