They don't mention Gandi because that would be a marketing disaster. Gandi do no advertising, no affiliate/referral links, or anything else shady.

You might pay slightly more, but I believe Gandi operate a significantly better service, catering to shrewd users (I don't work there or have any financial interest in the matter, just a happy customer).

In fairness, Namecheap seem like a pretty decent second-choice, and most of my ire is reserved for all the 'baby's first domain name' bottom feeders out there.