Feedback loops examples
At dribbble.com designers upload their own designs in order to get feedback from their peers who can then respond with "rebound" alternate takes on the initial designer's proposal. These can then again be rebounded and so forth.
The amount of rebounds a design gets depends on how much exposure it receives, which depends on the amount of likes, comments, tweets, and rebounds.
This can lead to the same designs taking frontpage positions for longer periods of time. As a negative feedback form, designs can be browsed by several parameters including color, recency, tags, and popularity.