Yep, I worked on a B2B product riddled with features that were there to make a sale. The success rate of those features converting to a sale was less than 20%, and none of those conversions were the whale clients.

The features were typically well implemented and integrated with the rest of the product, and totally unused.

The features added substantially to the complexity of the code base. It's funny to see HN defend quality over quick and dirty software. Though I understand and agree with the sentiment, the unused features were much more difficult to remove because of their "quality" (as measured in the eyes of the dev team).