Now I'm not saying that every company that is reviewed on Trustpilot is necessarily having this influence over the content but certainly some are. I think that unless there was some clear breach of the law, Trustpilot would be better placed to allow all review to remain and then allow the company to post their side of the story (as we know there are always two sides).
To get a feel of what I am talking about I have been researching a UK Company Universal Utilities Ltd (T/A Unicom) and here are the results of two different review websites: -
This ‘Trustpilot's Unicom review site is financed by Unicom Telecom and 88% of the reviews are positive glowing comments
This ‘Review Centre’ Unicom review site is NOT financed by Unicom and 88% of the reviews are negative critical comments
Now couple this information with a simple Google search of "Unicom Complaints" and the Review Centre website becomes more believable than Trustpilot. The only difference between Trustpilot and Reviewcentre is that Unicom pay Trustpilot to control the content.