"TomTom is contributing €20,000 to the OSMF ... In November 2022, TomTom announced that data from open-source projects such as OSM will be one of the super sources that power its Maps Platform."

20k for the data to power your Maps Platform ... cheap at 10x the price.

They involuntarily paid Microsoft some licence fees for the FAT32 file system way back when. This OSM contribution is voluntary.

I'm not sure what part or proportion of TomTom's services used by Microsoft either contain or rely on OSM data:

https://news.microsoft.com/2019/02/04/tomtom-expands-partner...

Cool. I didn't know TomTom was using OSM maps.