The engine can be used to make ads(optionally one file), of course it can do small exports.
Nobody really cares what the export size is for desktop anyway.
C3 runs on any modern computer so long as it runs a modern browser.
That's true cross compatibility, not "ehh it might work on Linux, have you tried Wine?"
Check the release log, then look at the other engines logs.
Unity, yep, the others... not so much.
Sorry, but if you were to say that C3 isn't for hobbyists, then I would have to agree.
Then again I can't expect people to develop it, and have it be free, because I don't expect the developers to be hobbyists either. They did that, now they don't. They quit their day jobs.
I also agree that deving without an existing income is next to impossible.
Gamedev sucks. Don't do it if it's not all you think about.