Evidence? You have gave it yourself, argumenting towards the success of the show, the books sold by Amazon etc. You have provided tons of pages of "evidence"
Not interested in discussing anything with the likes of you, anyway.
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If you mean "engagement" as in the metrics of the industry, maybe so. You're the expert in that.
However, there's a lot of people actually engaging with LotR content of films, books and games for years .