YouTube made a big change yesterday, shaking up the industry for online content creators. The popular website decided to stop serving ads on YouTube Partner channels that have not reached at least 10,000 lifetime views. The purpose of requiring the threshold views is to provide the platform information to ensure the validity of a channel. This will hopefully help to avoid advertisers' content ending up on inappropriate and/or illegal channels that violate YouTube's Terms of Service.
For more information, check out this article in Ad Age.