Heavily depends on company's presence in media and how much pressure the owner puts into it. The reports I submitted with evidence of DDOS and traces to the blackmail'er through IC3 form[1], none were replied.
On another side, as bliker mentioned, those are usually kids. Replying to them that you have submitted an official IC3 report usually stops them, and some were even asking to cancel the report.
On another side, as bliker mentioned, those are usually kids. Replying to them that you have submitted an official IC3 report usually stops them, and some were even asking to cancel the report.
[1] - https://www.ic3.gov/complaint/default.aspx