Placeholder for networks, that are not available (yet)

In the early days it was not possible to plan a posting or story to Instagram via API. Some tools like buffer then offered a kind of "reminder service". You where able to create to post in Buffer, but then you got a reminder message via app or email, so that you know, that you had to copy-paste a post manually.
This would be lovely for Mixpost to support all networks by being able to have a kind of "whitelabel network", that can be added. It's job is to be able to be nammed (like "WhatsApp Channel"), it has some typical social media fields (text, image, link). When the time is right, you get an reminder, that you have to create this post yourself. :)

Bonus ideas: Make the fields configurable, so that all typical kind of social media posts can be imitated (length of text, number of images, etc.)

Bonus idea 2: It's not only available for postings in planning, but also in realtime, which has to remind me, to make my todos (and mark a post as posted manually in a certain custom network).