The consumer version of BlackBerry Messenger will be discontinued after May 2019, as other vendor messenger services were more widely preferred in user communities.  However, an “Enterprise” version of BBM will still be maintained for corporate users.

https://www.engadget.com/2019/05/31/blackberry-messenger-shuts-down/

Time to Say Goodbye – English Version

https://blog.bbm.com/2019/05/31/bbm-faq/s/folders/19000163838

Today we’re announcing that we will be closing BBM consumer service on 31 May 2019. Three years ago, we set out to reinvigorate BBM consumer service, one of the most loved instant messaging applications, as a cross-platform service where users can not only chat and share life experiences, but also consume content and use payment services. The technology industry however, is very fluid, and in spite of our substantial efforts, users have moved on to other platforms, while new users proved difficult to sign on.