If you control the information, you can exert significant influence in the decision-making process of the individuals that use your service. You should not need a big research to figure this out.
Actually that happens also to be the most major "design gap" in Democracy (and I say that, even though I'm Greek). The fact that you will increase the decision makers in a topic does not mean that you will get a better & more objective decision, simply because they might lack the proper, accurate information to make an informed judgment. In other words, by increasing N, you average out the localized/special interests, but you also reduce the average amount of information each "unit" has on the topic (because you sum and divide by N).
So, coming back to the topic, accurate information is a key contributing factor for good decision making, especially for important topics like who will be your head of state for the next ~4 years. That is why diversification is beneficial even in your personal "information channels".