I won't shed a tear for DDoS services, but I seriously doubt this will have any relevant impact. These DDoS services exist because we have an Internet full of

I won't shed a tear for DDoS services, but I seriously doubt this will have any relevant impact. These DDoS services exist because we have an Internet full of devices that you can trivially take over by logging into them with admin/admin or other default credentials you can find in public lists. As long as these exist there will be people abusing them. If you want to do something about DDoS the thing that needs to happen is that the number of trivially vulnerable devices needs to be reduced. That likely means thinking about device security regulations and minimum security requirements, probably also vendor liability.