Yup, key point is it's way cheaper to find and fund a crazy who is already in relative alignment with your views than to run an actual agent. BUT you can never really call them off.
Discussion
The unfortunate reality too, is the cynicism this cycle breeds, in terms of rising political extremism of all sorts, is not immune to these dynamics. Although extremists tend to convince themselves that they are pure of heart, intentions and justified in their maximalist goals. Even though, they may serve as hapless aids in the objectives of far more powerful forces than themselves.