How do you think ad targeting works? First google and friends build a model of your digital habits and then they figure out the best ways to intervene in the digital space with ads that you will click on. Same with Facebook. These companies make billions every day and that's because they are very effective at using AI (linear regression) to modify user behavior on a mass scale and increase revenue for the advertisers.

Using what data as input?

And what do you mean by MSE of around 3 minutes? Do you mean root mean squared error?