This prompted me to go to Newegg and see if they still sell scanners. Yep, they do.
This is a terrible idea. It doesn't sync live, you have to send the entire notebook back and they scan it for you. That makes it much less useful that, for example, those special pens that scan what you write. In almost all situations, from art, to taking notes at meetings, it is preferable to have the digital copy immediately, not once the notebook is finished.
It's not really that bad? I think you're missing the target audience a bit. It's maybe terrible for you, not for everyone. Your main complaint seems to be 'it doesn't sync live' (well of course not, it's actual paper) and 'you don't have the digital form immediately' (that's pretty much the same complaint). But such a thing is not that important for everyone. I mean, once you wrote down the note, you already have it. So if your main requirement is merely 'having it', well then your settled as you have all access to it. And then you can have it digitized whenever you feel like.
How is this easier than keeping my notebook to access my notes? Does it make my notes searchable through OCR or transcription? Right now, you are selling a scanning service - which was deprecated in the early 2000's.
The main pain point with notes is finding the one that I am looking for. Make my notes searchable. That would make me use this service exclusively.
...and the idea is that your notes are then available and searchable through app on website, phone or tablet. So if like me you have lots of notebooks but they tend to occasionally be "tied away", collating all that in one place could really salve that pain point.