I would actually argue that Classic WoW and OSRS are not good examples. These games already existed. For OSRS, the mass cancellation of subscriptions immediately following game updates was a clear wallet vote. Most feature requests aren't asking for the return of something people already liked.

Classic WoW is also not as successful as OSRS, which is why they're exploring Classic+. Even OSRS, which was born on nostalgia, also gets significant new content updates (albeit polled).