Funny it seems like I only ever see their captchas for companies that don't care about customer experience or have naively set up their online tools. Most major websites don't use them (or have sane settings that don't trigger captchas), commercial or not. It's usually mid-tier companies that I don't care enough to wait for the page load, or monopolies that actively hate their customer (e.g Canadian telco) where they are most prominent.