User @name_user is over daily status update limit


Hey i’m getting the error “User @user_name is over daily status update limit” the last tweet was sended 2 hour ago, the api we are using is to send a message to users who got the last name most common in our country (Chile) so we send a tweet with mention and a picture with the bottle with their last name.
My question is how many tweet can I send in one hour with out getting blocked. Are we always will considered spam?

Thanks in advance.


What what what…