Not sure if that's what happened but as a B2C company we also don't acknowledge any feature or idea requests, and have strong ToS language against submitting an

Not sure if that's what happened but as a B2C company we also don't acknowledge any feature or idea requests, and have strong ToS language against submitting any unsolicited ideas. Our CS staff generally deletes/archives them without reading them if they can tell by the title. The problem we had was that a lot of users submit ideas we've already had or were already working on (I mean if we've been working on a project for 5+ years do they really think this idea didn't cross our mind), but then some of them think they are entitled to a little something for it. One of them tried to demand some kind of reward once they saw the feature had been implemented (even though we were working on it well before they even mentioned it and it wasn't a groundbreaking change or anything), raised hell like she had been cheated posting screenshots of her unanswered e-mail, and even claimed to get a patent attorney to help her. Fortunately that feature was present in a bunch of other apps so it doesn't look like it went anywhere. I suspect if we had said "We have passed this along" then our situation would be much worse. Basically with Duolingo's userbase size I am sure they have at least some malicious users.