I view technology and firms of this nature as completely legitimate. . .but the hope is that it is used in pursuit of real criminals (i.e. people who have actually stolen from or harmed others in some way).

The real problem, as always is the power given to government to have a monopoly on law enforcement and restitution. Their criminal courts get first dibs. Restitution is an after-thought. Their bureaucracies are just as subject to "greed" as any explicitly "for-profit" firm, and thus they inevitably prioritize the pursuing of their own ends; protecting the state or their department funding. . . pursuing victimless crimes and low-hanging fruit and making examples of people; rather than being subject to and incentivized by what justices the market most desires. They are able to externalize the otherwise deterring costs of this behavior, upon taxpayers, who cannot take their business elsewhere.

I'd like to do better than the smug satisfaction of crafty mice who stay one step ahead of the cat. Can we just kill the damned cat already?