My bad, I misunderstood. I just can't really tell what you mean by "amateur vs professional" without seeing examples.
For example, I'm an amateur film maker. I've only made student films while in grad school and wrote a few scripts that never went anywhere. Meanwhile George Lucas produced several films and is critically acclaimed.
The internet is home to mediocrity (and thus is the perfect place for growth). You wouldn't see these flash animations on television for example. If I uploaded my student films somewhere, that doesn't mean someone should try to make files of them here.
Professionally made Internet based verses are those such as
Adventure Quest because that evolved into a franchise with multiple games. It's still niche, so that isn't the problem, but it's in the realm of professional content. That's different than some random flash animation with eight episodes on Newgrounds.
What's next? Stick Page profiles? That's no different than Newgrounds.
When I said "medium doesn't matter" I was talking about for professional/notable works of fiction and not amateur content.
Hence:
Re: Newgrounds verses, they're allowed here because no-one has taken issue with them before you, and I don't understand your stance on disallowing them enough to agree.
If this is true, if that's really how the rest of the staff feel, then we really don't have a line drawn between original and official, or even fanfiction for that matter. We can quite literally, by no exaggeration or strawman, accept fanfiction at this rate. Nothing's stopping Anime War profiles except "we don't allow fanfiction because...we just don't". After all, as I've mentioned before, the reason was apparently because "fanfiction messes with the canon", which honestly no longer applies since we have
Alternative Canon and Composite Profiles now.