This new standard simplifies access controls & may be helpful in reducing some misuse by scammers

https://www.pcmag.com/news/372724/facebook-messenger-now-requires-a-facebook-account

Facebook has used the quiet Christmas period to tweak the requirements for new Messenger account sign-ups. It’s now mandatory that you also have a Facebook account.   As VentureBeat reports, Facebook rolled out the change quietly, but has since confirmed a Facebook account is now required for new sign-ups to Facebook Messenger and Messenger Lite. The reason? Simplicity, apparently.

A Facebook spokesperson explained, “If you’re new to Messenger, you’ll notice that you need a Facebook account to chat with friends and close connections … We found that the vast majority of people who use Messenger already log in through Facebook and we want to simplify the process. If you already use Messenger without a Facebook account, no need to do anything.”

As the spokesperson confirms, existing Messenger users can continue to use the service without requiring a link to a Facebook account. All new users have no choice, though.