I am looking to build a community of hundreds of thousands of Odoo (Version 17) portal users who I would like to have a daily or weekly exchange of communication with. The idea is to get them to create their profiles and then thereafter communicate with them daily or weekly at manageable costs. Some of the ways I could communicate with them is via whatsapp, email, sms or through the existing Odoo chat function. Can Odoo handle this kind of operation smoothly? Any examples of similar use cases?