From October 9th, 2022 to December 1st, 2022, 50% user give 5-star rating, 50% user give 4-star rating. for Messenger Bulk Sender - Messager DM Bot chrome extension.
It has issues but i like it
Pay for it very cheaply and you'll get what you want. Not a scam, very safe, and perfectly what I wanted! What it does: Just collect the facebook IDs of your intended recipients and it will send a group message to them.