The business may be legitimate, but it doesn't start being a good idea. For hostage situations, these consultants can actually mediate with the abductors. For ransomware, the business is essentially just paying the ransom, with the only additional service provided being converting to bitcoin for the user. That's not worth this or any markup, and it doesn't fix the problem of people paying ransoms when they should not. But I suppose the business could eventually make itself somewhat ethical.