> Is there any evidence that the vast amounts of clicks and user interactions companies have been collecting are worth anything at all? Yes. Every advertising

> Is there any evidence that the vast amounts of clicks and user interactions companies have been collecting are worth anything at all? Yes. Every advertising platform ever uses this information. In Europe, you have to have regulation that makes account costing (what the US might call forensic accounting) possible. The presentations on A/B tests by FANG companies might also interest you. They are on Youtube.