Sorry if the post was unclear. This is an example of a plant that exists outside the realm of this particular species' "natural perfection." The parent plant was selected in cultivation, and (based on the prices the divisions command) is 10-20x more valuable than a comparable non-variegated specimen. What do you think a variegated N. macrophylla or N. hamata would cost compared to a regular one? Inducing variegation (through selection, virus, artificial mutation, etc) is a relatively old horticultural trick to increase the value of plants. Now imagine the possibilities that will emerge as genetic modification becomes increasingly accessible. Hopefully that answers your question.
@emc2: yep, that's the one.