This is kind of what I expect Datomic's path to be as well. Early adopters will take most of the financial burden in order to recover the development costs, an

This is kind of what I expect Datomic's path to be as well. Early adopters will take most of the financial burden in order to recover the development costs, and open sourcing will happen once it's more strategic to use Datomic as a way to promote their knowledge and services broadly than it is for them to make money directly from the product. Support tiers will remain even after open sourcing, of course. I don't expect it to turn into abandonware.