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by jiggy2011 4585 days ago
One problem with these sites is the reputation system which suffers from the same problem all "star rating" systems suffer from. Namely that anything less than 5 stars is seen as a negative and higher paying clients will often look for providers with solid 5 star feedback.

Clients can abuse this by demanding additional work/scope creep in order to award the full 5 stars. In theory it can go both ways as providers are also able to rate clients, but in reality the rating is far more important to sellers since a buyer can go to one of these sites without a reputation, post a project and still receive a ton of bids.