Not exactly the same type of product, but Games2gether is an example of a succesfull feature voting platform. It belongs to a french gaming company named Amplitude Studios and their mostly known for releasing increasingly better 4x strategy games (The Endless game series).
They built a platform where they have a basic roadmap, dev diaries and occasinal votes about specific features, I think the only reason this works well is that it’s highly curated and the choices are almost all predefined.
The best example I can find is when they added a faction to Endless Legends. They first asked users to design the name, history and basic characteristics of a faction, the main restriction was that it had to revolve around using the minor factions. There were a lot of good suggestions and in the end they picked the best ones and asked players to vote on them. I think thats a good way of maintaining company agency on the development of a voted feature.
The same process was repeated for the visual design, sigil and boat unit. From those parts they crafted a whole new faction, that actually turned out pretty cool. (A bunch of robots that lead a cult that preaches hate for the ancestral beings that made the world how it is)
Voting for features is bad for precisely the reasons described herein. But voting for problems to solve is a great idea.