Why are SBB and Conforama advertising on a Neonazi website?

Here another interesting article from Switzerland where advertisers have ended up on right wing websites, trusting their media partners blindly (in German):

https://www.watson.ch/Digital/Rassismus/383131039-Warum-SBB-und-Conforama-auf-einer-Neonazi-Seite-Werbung-machen–und-nichts-davon-wissen-