We are having a problem with spammers using BBM to send a large volume of unwanted SPAM invites. These are not ads coming from BBM – these are third party spammers sending invites to randomly generated BBM PINs. This is a significant issue that we are taking very seriously - our team is working diligently to block these spammers and put systems in place that will stop this unauthorized abuse. You can help us by making sure you have upgraded to the latest version of BBM. Thank you for your patience, - The BBM Team