The US basically isn't enforcing a whole host of laws and regulations regarding finance (hasn't since the 2007 bubble, even less so these days) which means the current bubble probably has a bunch of fraud going on—sorry, "poor information environment" is, I think, the euphemism du jour
Since online advertising has basically been filled with I Can't Believe This Is Legal™ fraud-adjacent behaviour for years, I'm personally taking the numbers coming out of tech with a grain of salt