Hi there!
Could you elaborate on what extra features are you looking for than just broadcasting offers & discounts to your users?
You could also monetise your chat through features like role-based access control, credit deduction etc (just an idea)
You can give
CometChat a try. It integrates within minutes and has features that can surely bump up your engagement & retention percentages.
There's a free trial for 7 days so you can give it a whirl to see if it really fits your requirements.
In case of any assistance, feel free to DM me here!
Have a wonderful day ahead!
P.S: I work for CometChat but my thoughts are my own