A simple, popular idea can lead to less new ideas through a process called cascading. An information cascade is when someone observes the actions of others and then engages in similar actions or takes up similar positions. This can spread even when people have information that signals that they should take other actions or positions. An information cascade occurs when people make decisions sequentially rather than simultaneously. Later people watch the actions of earlier people, and base their actions on the earlier ones. An example would be someone who searches for a new song by looking for the most popular songs. The cascade can be based on little information and people could ignore new information. This cascade can easily be based on faulty information, and the credibility of crowds could quickly surpass that provided by traditional experts and authorities. Yet, cascades are fragile and can be overturned by people with more compelling information causing a counter-cascade.
If you use Luhmann's definition of meaning "meaning is the product of the different choices that a system makes to deal with complexity" the simpler message holds less choices and is less able to accurately deal with complexity. Thus Feedback loops based driven by simplicity are poor at dealing with the complexity of the world we live in, instead paining a simpler, compelling picture.
One of the sites where this loop dominates is Facebook. This is no accident, it is a product of Facebook's design. 
According to its mission statement “… Facebook’s mission is to give people the power to share and make the world more open and connected…” In this aim, Facebook’s engineers manage people’s home page feed (newsfeed) so that voters see things they like and stay longer. For example, if a voter is interested in politics will show posts by their friends that support their political views but repress those that would clash \cite{Keegan2016}. Why is this a problem? By only showing views that users are likely to agree with, they are sheltered from new ideas. They end up trapped in an echo chamber listening only to the similar.

The Complexity Loop

Not all people are conformists. Punks, goths, dissidents, freethinkers. People alienated by simplicity loops, or who find some of their assumptions dodgy, often come together to create feedback loops on their own. Although less popular than sites that follow simplicity loops, there exists a thriving ecosystem of sources of alternative ideas online. And these sites are petri dishes for new ideas.