Really surprising that more companies aren’t doing this. I did a quick search and saw that The Princeton Review was doing this (https://techscience.org/a/201509

Really surprising that more companies aren’t doing this. I did a quick search and saw that The Princeton Review was doing this (https://techscience.org/a/2015090102/index.php https://techscience.org/a/2015090102/index.php) on their own. Of course I bet if this became more common, consumers would start to get annoyed and try to game the system. Cool website though.