Yes, what dredmorbius said. There's also https://duckduckgo.com/feedback which lets you report/request all kinds of stuff. (It's listed as "Feedback" in the menu at the top-right of the results page.)

Initially it was just "send Gabriel an email", which he still graciously responds to, but I've been trying to do things the "right" way more recently because I'm sure he gets a lot of email :)