Ask HN: Is it ethically right to build product that might end up as a rip off

Two weeks ago we launched a product on Product hunt that went on to #1. There were a lot of new users coming in and asking for new features/feedback, we were trying hard to keep up with the requests (used Notion for a while to track). Then I found Canny (one amazing tool) and a few others. But all of them were a little expensive for us and decided to make one for ourselves to track and manage feature requests from customers. http://featurequests.com/ is the landing page.

Is it ethically right to build a product that I know might end up as a rip-off, especially because these products already influence my design and thinking?