Wrong. this is a security issue with Rust Servers themselves. Its an exploit. Its a kind of DDoS, but doesn't follow the same kind of attack as a DDoS. They are not even slamming servers with packets of Data.
Wrong.
"In computing, a denial-of-service attack (DoS attack) or distributed denial-of-service attack (DDoS attack) is an attempt to make a machine or network resource unavailable to its intended users. Although the means to carry out, motives for, and targets of a DoS attack may vary, it generally consists of efforts to temporarily or indefinitely interrupt or suspend services of a host connected to the Internet."
Just because it isn't a vanilla DDoS attack doesn't mean it isn't one at all.