Ok, after reading some comments on other places, I think I get it now. While you are free to use their open sourced tool chain, which is what they have certified, you still doesn't fulfilling the legal requirements unless you buy the certified tool chain. Just because it is open source, doesn't legally guarantee that is what's certified.
So, you pay to get the legal status of the certification. Did I understand this somewhat correct?
Just looked at the screenshot on the Victor Mono page and the kerning makes me want to rip my eyes out....