There are no exceptions. Google the search engine was paid for by Google Ads past the initial period and those are certainly marketing and sales. Amazon certa

There are no exceptions. Google the search engine was paid for by Google Ads past the initial period and those are certainly marketing and sales. Amazon certainly focused on sales stuff early on. And while AWS is a technical marvel the pricing scheme of hiding costs behind outbound data costs was brilliant. Evil but brilliant. Having a good product is the goal of Engineering and that is the bare minimum.