Also an exploding market of "ransomware remediation firms" who claim to decrypt hacked files, but actually negotiate lower ransoms with the criminals, receive decryption keys, and pocket the difference -- all without telling the client.
The FBI has shown no interest in these businesses, which encourage and reward criminals, in part because at least one of them has the #2 man at the FBI on their board of directors.
The level at which Russian organized crime has infiltrated American society is hard to overestimate. The ransomware "industry" is no longer teenagers in their parents' basements, it's now a huge international business sponsored by the governments of Russian, Iran and to a lesser extent North Korea. That's another reason nobody on this side of the Atlantic is too interested in trying to shut it down. Kickbacks to Congress would surprise me not at all.