I was previously using the Messenger Broadcast API to send regular updates to ALL users on my Facebook chat bot. These updates include daily news, feature updates etc. However now that the API is deprecated, I can't find any alternative API to do the same thing.
One possible alternative to this is to iterate through all the user's of my app and manually send them messages using the SEND API. However this is quite inefficient and you can easily hit maximum rate limits as mentioned in the documentation. So I would have to send out this manual update over a long period of time slowly to avoid hitting the rate limits. This feels like a hacky fix when the Broadcast API provided such a simple solution.
I can't seem to find any obvious alternative to the Broadcast API in Facebook's documentation. Is there any alternative API/technique I can use for my use-case?