Facebook has established new restrictions for how many event invites a user can send at one time and how many pending invites an event can have, according to users who are seeing a notification preventing them from inviting more friends.

The Facebook Help Center confirms that users cannot send more than 100 event invites at a time and an event can only have 300 pending invites at once. This could hinder the efforts of some event planners or promoters, but also help users avoid getting too many invitations they aren’t relevant to them. As a result, event organizers might experiment with Facebook’s paid options for promoting events to users who are most likely to be interested in them.

The social network has long had different mechanisms in place to limit spam and unwanted invitations, but this latest cap seems to be a development from some time in March or before. Social media author Mari Smith pointed out these rules last week, and user Cory Wijnhamer provided a screenshot of the notification he saw to AllFacebook: