Yes. The free market would solve the first two, the next two aren't even crimes currently, and with the last the crime is the violence/vandalism not someone telling a fib.
Maybe, maybe with an unwieldy amount of time the rubes would all die out as they administer snake oil to themselves and their families, the pyramid schemes all collapse under the weight of their inability to produce the results their funders sought, and the collective, unorganized and ungovernmented multitudes publicly shame and criticize those industry leaders who conducted research into the effects of their products, but decided instead to make some shit up to sell more.
Maybe more likely: as the divine wisdom of the heavenly free market dictates, a few really good liars get a massive foothold and build empires on it. And maybe in the truest American free market fashion, these opportunities to profit from fraud are available to everyone! Even if you’re not clever enough to build an empire, you can at least move state to state, lying, selling more slow-burn poison, all the while with the cops backing you up when the mob forms, because fraud and the affects of lying are as protected as saying something ignorant or mean.
I don't say it doesn't I don't say it does.
And liable isn't a crime? What's then stopping people from calling each other pedophiles which in turn causes them to lose jobs/relationships/etc.
Should Alex Jones have been convicted of liable due to his claims surrounding Sandy hook?
I'm no free speech absolutist, as you'll end up eating your own tail, but I'm a 100% believer in free speech that does not legitimize malicious use (just because you lie about someone doesn't mean you will be prosecuted that if there were to be a law enacted then free speech won't protect said lie), such as no liable, no threat of violence, no willfully scamming/swindling and no abuse of authoritative/alertive speech (as in saying fire in a theater when there is no fire).
Secondly, you're okay with someone inciting violence/vandalism/crimes, and people acting explicitly on that person's direction, as long as only the actual violence/vandalism/crime is punished?
Yes. Everyone has agency, if I tell you to commit a crime it's up to you whether to do so.