OMG folks such an amazing script but all that seems for nothing without at least a simple internal messaging system.

The current contact seller form is absolutely useless.

I want users to return to the site to check the message to encourage more usage and engagements and not wasting my emails quota on spammy emails.

You are sending user generated text via email LOL.

Please consider this option ASAP. It should be a core function and not a separate plugin.

We can't rely on those plugin messing with the updates.

It doesn't have to be fancy just functional. I could develop that but I am not familiar with the osclass structure.

Thanks

What is wrong with provided plugin?

Omg omg...
https://osclasspoint.com/osclass-plugins/messaging-and-communication/online-chat-plugin-i58

https://osclasspoint.com/osclass-plugins/messaging-and-communication/instant-messenger-plugin-i50

Thanks for your suggestions and there is nothing wrong with current paid plugins. I am just expressing the fact that you can't have a site that heavily relies on communication without heaving some sort of core messaging function that will always be compatible with updates.

It's not like am asking for some custom code completely of side of the scope.

Depending on third party code for something this simply I mean its bad no matter how you look at it.

Its my personal point of view.

It does not use third party services and it does not make sense to do something basic in core, as there is never enough of configuration for messaging.
And not everyone needs it, means suitable for plugin integration.