It is not 'by OSM'. The foundation is not involved at all, neither are members of the community.
This is big corpos who put together their data, and they have to include OSM because it is so great.... which also means they have to open up this data due to our ODBL license!
And yes, we can thus absorb this data back into OSM, but it is not worth it
WHAT? HOW DARE YOU INSULT OPENSTREETMAP, THE MOST USED DIGITAL MAP!
(In all seriousness, I wouldn't be surprised that OSM is actually used the most, especially because it creeps into many other maps. But of course, this usage is spread over many apps and not a single ~~advertising~~ map product, where GMaps is undoubtly the biggest one)
Because they render the map offline (and have a slow render engine)
Looks like V2. That one shows the grid for not-yet-rendered areas
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!
Then, please, add this single place :)
You might make the difference for someone else