An excerpt from a document on Three's website about data management across their network:
TrafficSense™ are tools and insight we use across the Three network for
the intelligent management of data traffic. TrafficSense™ looks at types of data traffic and behaviour that stop other users from enjoying a fair allocation of our network. Traffic management is a tool used by TrafficSense™, but it will only manage a very small percentage of users on our network – and the vast majority will actually benefit from higher speeds and a better internet experience.
The only thing that could slow down their network and prevent other users from 'enjoying their fair share" would be a person doing a lot of downloading. The only way you could prevent that would be to slow down their downloading so that it has less of an impact on that 'cell' of the network. On what grounds do they slow down a person's data if there are 'no strings attached' to the usage of said feature?
It is a contradiction in terms. There are quite obviously invisible, silent thresholds for heavy users of data - even if they suggest that there aren't.