Facebook plans to start charging for verifying applications built for the social network.
The Palo Alto-based company said the process is meant to increase users' trust of applications that are posted on the site.
It is also intended to help developers wanting to build a serious business get more visibility with users. But the annual verification fee of $375 has some developers upset.
They don't like the idea of paying each year, saying that will shut out many smaller developers that don't have the money to invest in Facebook applications.
The social networking site MySpace said it has no plans to charge developers for reviewing applications.