I have a bit of a novel solution to this that you might like.
I hate MLM schemes. Yes, you can argue that they are legitimate. All they really do though is ask desperate people to deposit what is essentially the only money they have on the basis of a completely false representation of who they really are.
Comments and reviews of such schemes are bought and paid for on places like Fiverr. Actual businesses aren’t registered anywhere, the only legitimate thing about them is that they have paid for website hosting and a domain name.
Anyway, I flatly refuse such work if someone messages me. If they order direct, however, I give them my usual high standard of work. Later, though, if I am really uncomfortable about a piece I have written, I will publish my own ‘5 Reasons NOT to Invest In… etc etc’ on a relevant industry news site or scam forum.
NEVER do I say that I have any connection or insider knowledge on a company, I just write what I as a person think of such a scam and this fits with the usual content I personally put out anyway. It’s just all about balancing the karma.
That said, some orders you should cancel as soon as they come in. Most MLM orders don’t come directly from the MLM company owners, they come from middlemen pretend SEO agencies. (A bit ironic really). Anyway, if you get a vibe that you are dealing directly with a site owner, just run. These people want and expect to start converting as soon as you deliver. If that doesn’t happen, they are going to take it out on you. This is because they are basically small fish mafia egomaniacs who will cut anything and everything down that gets in their way or that they think serves them some kind of injustice.