Well, the MMO game is our ultimate goal, but it's also a rather complex and difficult thing to make, and we know we must do small steps if we want to get that far
There are few other things as well that are risky. As you have said nobody tried making it, but that also means the game mechanics is untried and it's possible that it will have to be a rather different.
As for the ModDB - I've posted both videos to ModDB and both times the generic reply (after almost a day) was that the news has been archived, what means it won't get shown on the front page. The message suggested that the reasons could be "poor formatting, grammar, not relevant, spam, lacking images, videos, download links etc."
I'm not a native English speaker so the first two reasons may apply, although I wonder how the first two articles managed to survive the scrutiny.
I hope it wasn't the third reason