Side question (non crypto related), does paying for it automatically makes the advisor legally liable for the advice in most 'advanced' jurisdictions?
Again, generally speaking they carry insurance much like a doctor has malpractice insurance.
The risk for them is causing enough damage (and the resulting insurance payouts) rendering them uninsurable which is generally a career ending state to be in.
Truly egregious stuff can end up with disbarment and other certifying bodies revoking stuff. Again much like a doctor screwing up to the point where they lose their license.
Then, like anyone else, criminal liability is always a possibility if the situation calls for it.