"There are thousands of volunteers who donated their labour to Duo... Bit by bit all of our work was hidden from us as Duolingo became a publicly-traded company."
From 2015 to 2022, I spent hundreds of hours on Duolingo, translating articles, answering language questions on the forums, and helping to improve the smaller courses by reporting mistakes.
There are thousands of volunteers who donated their labour to Duo: the course creators who wrote their course...
Thanks. I'll continue my small contributions then.
If anyone want to help I can recommend StreetComplete. It's a bit like pokemon go, but you'll help improve the map of the world instead. Only in android now I think.
Open source is a safe bet since anyone can make a new fork(Spin-off) of the original if it went down a direction you didn't like or just wanted to make a version with your preferred features.
So openstreetmap is the current safest option since it has an Open Database License.
Here's the summary for the wikipedia article you mentioned in your comment:
The Open Database License (ODbL) is a copyleft license agreement intended to allow users to freely share, modify, and use a database while maintaining this same freedom for others.ODbL is published by Open Data Commons, which is part of Open Knowledge Foundation.The ODbL was created with the goal of allowing users to share their data freely without worrying about problems relating to copyright or ownership. It allows users to freely use the data in the database, including in other databases; edit existing data in the database; and add new data to the database. The license establishes the rights of users of the database, as well as the correct procedure for attributing credit where credit is due for the data, and how to make changes or improvements in the data, thus simplifying the sharing and comparison of data.
Not really , they use the Open Data Commons Open Database License which means it can be used commercial but they have to release changes under the same license.
It CAN be used in commercial products, but any contributions to OSM from those commercial enterprises is still open, so you end up with commercial users contributing to the open system.
I'm in charge of GIS for a city that uses and contributes to OSM and QGIS.