>Aviatrix Controller is run by approximately 3 percent of all AWS customers, [...] a relatively small proportion of all customers.
That's still a large number of them when multiplied by the number of AWS business customers, estimated at around 1.5 million.
I can't blame a researcher for publishing exploit code that is already in the hands of bad actors. Yes, this may enable a few script kiddies to do some damage, but those aren't the kind of people who negotiate ransom payments and employ money mules.