I cannot pin down this idea as rigorously as I would like, but there seems to exist such a trait as liking to think abstractly, and that this trait is mostly orthogonal to IQ as we understand it (although a "you must be this tall to ride" effect applies.) With that in mind, I do not think that any but the most outlandishly powerful and at the same time effortless intelligence amplifier will be of much interest to the bulk of the population.