The mobile license is per game (single title) without any restrictions in regards to digital distribution for all 5 platforms & there are no limitations in regards to how much you can make from crowdfunding. The only thing is that your crowdfunding pledge prizes can not contain the game as a physical (boxed/packaged) product; only digital version.
Hope this clears things up a bit better?
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I don't know if you have to pay the full €99 to upgrade from the €49 indie single/individual to indie multi-user license. & no the €490 is fixed because it's a per game license. I think that the indie multi-user license comes as part of mobile/professional license options though.
I think in the future, once we've got things a bit more organized, we may sort some things out where helpful people might get free licenses/discounts, or other stuff, for things like video tutorials, helping translate the engine into other languages, help bring in new customers etc. It's just an idea right now mind & not set in stone - just something me & Alex vaguely talked about via email.