The fact they constantly have to rotate to avoid blocks is because they are used for abuse and are attempting to essentially attack network services.
Something like private aliases attached to a real account you actually have adds privacy, but retains accountability. (You can create aliases on Proton, Fastmail, Outlook, etc. but they are attached to your real account so abuse is manageable.) A service rotating temporary domains to avoid services blocking them is a malicious attacker, and should be treated as such.
Something like private aliases attached to a real account you actually have adds privacy, but retains accountability. (You can create aliases on Proton, Fastmail, Outlook, etc. but they are attached to your real account so abuse is manageable.) A service rotating temporary domains to avoid services blocking them is a malicious attacker, and should be treated as such.