The blame should be put squarely on the shoulders of tophatter.com. They know the quality of what is being sold and choose to look the other way for the sake of making commission and sales fees on these imitation goods. In my estimation and also the interpretation of the law this is outright FRAUD.
Inverse operations are opposite operations that undo each other. Addition and subtraction are inverse operations. Multiplication and division are inverse operations.
Undo is a function performed to reverse the action of an earlier action. For example, the undo function can undo deleted text in a word processor. Some software programs may also have the capability of performing multiple undo's.