They also buried a call home into the VBox Guest Extensions and eventually started sending legal demands to companies as well. Because while VBox was open license, the VBox Guest Extensions have a non-commercial use license by default but that doesn't stop VBox from asking you to install them innocently on the first run.
Also 3 years ago, the guy in charge of a Oracle database we had (now migrated to MSSQL) accidentally downloaded the wrong Oracle database software from their portal. It turns out Oracle just lets you download any variant in their portal and then just send you legal demands for payment when you accidentally use a higher tier than you licensed. Something they can absolutely fix themselves to prevent. Of course we told them to fuck off since we didn't use any feature specific to the other tier and deployed the correct variant.