It is interesting how folks miss the article for the headline. The headline is link baitey, the article tries to explain a financial device called a 'stock collar' which is known in M&A circles but not be common knowledge for startup founders.

I read it as, "Hey, here is this financial tool to consider when selling your company called a stock collar, and here is an example of how using it would have been advantageous." That is a reasonable thing for someone to know.