4chan's comment system is awful. I still don't really understand how it works. It seems like they could improve the design and pipe in new comments as they arrive, thus negating all the extra server load caused by browser extensions refreshing every second.
Of course, I have no experience dealing with ~1B page views/month.
"If you can find a subtle way to segment your users by their sentiment towards your app, you can then ask one of those segments to write reviews and not the other, thus skewing the ratings."
It skews the ratings in your favor, deceiving future users about the actual quality of the app.
Of course, I have no experience dealing with ~1B page views/month.