While the general idea is right, maybe it's not the best example. Elastic did contribute quite a bit of code to Lucene to the point where it almost looked like

While the general idea is right, maybe it's not the best example. Elastic did contribute quite a bit of code to Lucene to the point where it almost looked like a project of Elastic NV. It seems however the Apache Lucene project managed to stay untainted by it and is by any measure a very healthy and functioning open source project.