Should be possible. With reviews however, one needs a central curator to weed out the spam reviews...
whether they buy out the project
Which is why an open license is important: it allows to fork if needed.
This is actually a really interesting case. On one hand, there is typically a specialized company involved creating those maps. On the other hand, the mall which requested them is, by law, required to create them and to put them at visible places in the mall (thus "publishing" them). According to the European Database Law, they would thus not be eligible for copyright and should be considered public domain!
However, I wouldn't build a multi-million company on it...
You can also add those (and many more) with https://mapcomplete.org . This is a different app (or rather) a website, which was inspired by streetcomplete
MapComplete is indeed limited to creating new points, but it can modify attributes of existing ways. I'm assuming that most navigable waterways are drawn, but not all necessary attributes are known, where MC could help.
And: tackle it one layer at a time :)
Wow, very good first attempt! I'm reviewing the layers you made (esp. fuel station and sanitary dump station) and they seem very well done!
I've spotted a few small mistakes, but nothing fundamental.
It would IMHO be even more interesting to have a layer about the canals themselfs, to indicate what types of boats (e.g. small boats, kayaks, ...) are legally allowed to and physically possible to go over a certain waterway; that would be great!
Check OpenStreetMap (e.g. using MapComplete.org) if the data there is correct. If it is, update Organic Maps or the maps in Organic Maps. (I'm more of an OsmAnd person, so don't know how that is done)
As MC dev, I'm a bit curious on how your data pipeline works. Is there some documentation around for this?
We don't do "approval" here, all changes are live directly. However, it might be that your application of choice simply didn't update yet.
Would you mind on elaborating how you would expect it to work?
If you have a lot of interactions with canal boaters, it might be interesting to create one or more custom layers in mapcomplete. Give MapComplete Studio a shot (but keep in mind that it is not exactly user friendly, let me know where you get stuck and I'll try to fix it).
If you have created one or a few layers you like, let me know and I might include them in the production version of MapComplete.
Looks like V2. That one shows the grid for not-yet-rendered areas