An interesting Media Watch report on BYD (Build Your Dreams) identifying and banning reviewers who don't provide positive reviews of their cars, and also funding reviewers who give positive reviews:
https://youtu.be/k9vptWsqgFM?t=332
"BYD sues 37 influencers over online defamation and has placed an additional 126 under internal monitoring for alleged disinformation and damaging content"
it's not easy building people's dreams.