This tool reflects that profit by assuming a current strike price based on average valuation changes between rounds. Instead of saying that you get the full value of the stock you buy, the calculation takes into account that you also have to purchase the stock.

This tool doesn't explain the dynamics going into the estimated profits (though it links to things that do), but it helps people avoid over-estimating the value by missing dynamics like strike price.

I never said anything about this tool. Do that calculation yourself, if you're looking at thousands of dollars in compensation it makes sense to do the research and unerstand things fully.