This term finds usage in the pharmaceutical industry, as in "me-too drugs". Namely, drugs that are manufactured in order to escape patents applicable to an original, upon which the derivatives are modelled closely enough to have the same effect, but with sufficient chemical differences to warrant their own patents. Usually, the term is applied disparagingly to variations on a theme, that do not provide sufficient extra benefit over the original to warrant effort being expended upon them, but which are produced in order to try and grab market share from the original. The canonical examples are tranquillisers that don't exhibit measurable additional potency or efficacy over an original, but which are made in order to cash in on a lucrative market.