Sites like this seem to indicate there are tonnes of fake accounts on Pinterest: www.buyrealpinterestfollowers.com
My guess is that the majority of accounts are fake, and most posts are uploaded by spammers. However, this may be not much of a problem - like the HN / Digg / Reddit community the core Pinterest community is enough to rise the "good" stuff to the top I guess. If "social filtering" does work better than Google's algorithmic filtering and can't be gamed - Pinterest will succeed.
In some ways Amazon has had similar functionality for a while, called the "wish-list". They could easily have build something similar based on their existing data.
My guess is that the majority of accounts are fake, and most posts are uploaded by spammers. However, this may be not much of a problem - like the HN / Digg / Reddit community the core Pinterest community is enough to rise the "good" stuff to the top I guess. If "social filtering" does work better than Google's algorithmic filtering and can't be gamed - Pinterest will succeed.
In some ways Amazon has had similar functionality for a while, called the "wish-list". They could easily have build something similar based on their existing data.