The key phrase here is "turned into scam" which means it started as a legitimate company. It is important to know that since these so called influencers have no prior knowledge that the owners would turn out to be scammers or that the project is a scam from the start. They will become liable if they're already aware of the fact and still promoted it.
We have seen so many companies turned out to be a scammer and so many business executives and celebrities supporting them until they found out it was a scam. Which means we can't punish them for it until it's obvious to everyone, after that if they still support it then we could actually say it could work.