We came to the conclusion that this was the best licensing model after some hesitation. This hesitation stemmed from the hope that it would be possible to construct a copyleft data license, or reuse the only existing one (Open Database License (ODbL) v1.0 (Q1583)). We became convinced this was futile and thus a bad idea through reading these references: List of references on data licenses (Q2008).
For convenience, we maintain a list of related datasets and their licenses.
If not explicitly stated, no license is granted on the software hosted here. This is most likely due to omission, but possibly more strategic. We would love to have a deeper conversation with you on those topics. Please do reach out.