Another move in the direction of political correctness and making decisions according to optics. Have you considered valid business purposes for a company doing a particular act or are you just deciding that everyone thinks this was a "scumbag" action?
HN's entire business mandate, such as it is, seems to be to encourage technological growth in the interest of profiting tangentially off the growing pie.
Edit: as for whether Comodo had a "valid business purpose" for the action, sure, in the same sense that patent trolls have a valid business purpose. Read this statement by their CEO: https://forums.comodo.com/general-discussion-off-topic-anyth...
It's surreal. He tries to shift the blame to Let's Encrypt for choosing 90 days as their default certificate expiration date, somehow implying that 90 days is Comodo IP.