I ike the concept of a company rewarding the end potential customer with tokens to watch an ad, but I believe there are a bunch of privacy issues involved in targeting the right customer. Also, "traditional" internet advertising keeps alive a lot of useful sites and free a set of services (I believe things like youtube could easily be profitable with much less ads, but you know: there's no limit to money craving).
That is why it is very important for the end user to have control over their privacy and this is something that ProChain would like to work on. The team wants to take care of all the stakeholders so that everyone can have the maximum rewards.