You are right Jean-Marc, users of Map Maker do often not know what they sign up for. But nor do users of OSM: most of them don't even know what the the license OSM is under contains (see the current license debate: I dare to claim that a lot of the community has never thought about "license" before the debate in such a way they do now... you can see it in most of the ongoing discussions: a lot of things are criticized on the new license that are actually not any different from the old one... and so on). And people bawling for anarchy by just tagging in a way nobody else in the community would do, confirms it. not all mappers actually got the right idea of OSM. but fortunately its only a minor part of users. :)

what I want to express: I don't think - especially not from a psychological point of view - that to harsh critique and exuberance in expressing feelings is the best way to attract attention. We should find a way to actually promote OSM more... competition is now up and running, and just reacting to news concerning our "enemies" ain't bringing us anywhere. Pointing out the strengths of OSM is indeed a good idea - you are totally right about that. But the main question we should address is where to do that in order to gain the biggest attention and attract the most users possible. anyone has 50k$ left? ;)