I feel like I had a unique experience working at a place where we paid for it. but I expect that is more legal reasons and the dev not wanting to rejig the software to use a business free alternative.
Considering how much money a salary is, it's easy to see how 30/40€ of license (or whatever that is) is a negiglible sum to save on potentially enormous legal troubles.
Also, depending how big the company is, automatic installation and deployment systems might be in place, and changing that also has a cost.
It's fine, but it's missing basic features in the GUI that made me reinstall WinRAR.
For example, when opening a downloaded zip/rar file directly from the browser and click the Extract button WinRAR open a decent Extract Window with the option To open the directory where files were extracted and persist that setting forever (such a basic feature even MSs builtin tool has it ffs) it's extraction dialog doesn't even automatically copy the name of the archive to the destination field, if you extract it as is it'll just dump all the files wherever however they are smh
I mean just look at this basic af extraction dialog
Compared to WinRARs more sophisticated version
End result is I have both installed, WinRAR for day to day extractions and 7-zip for compression and extraction of anything that WinRAR can't handle