Earlier quoted context omitted.
> This is pretty much exactly what happened to MySQL, and now we have MariaDB, which is a better and truly open source product. This is controversial example, in my understanding MySql creator requested to agree with his terms for all OSS commits, which gave him copyright rights on codebase, then sold his rights to Sun, and only then created MariaDb - OSS fork.
Where is the controversy there? Did he sign a non-compete? NextCloud and OwnCloud Jenkins and Hudson More software is good. I'd say the MariaDB-is-better conclusion is controversial since the improves to Oracle's MySQL are substantial. At least around Innodb, and disregarding their embarrassingly bad bugs.
Controversy is that he accepted patches from OSS contributors, but assumed his own copyright on them, then sold his rights to big corp (Sun), which (Oracle) closed some sources, it is probably not very clean behavior.