This is actually a new take on a fairly well known security/DoS attack called the "slow post" attack (https://blog.qualys.com/securitylabs/2012/01/05/slow-read

This is actually a new take on a fairly well known security/DoS attack called the "slow post" attack (https://blog.qualys.com/securitylabs/2012/01/05/slow-read https://blog.qualys.com/securitylabs/2012/01/05/slow-read) pretty novel to see it used the other way around though!