you can not just make 5000 dollars with the free edition you must get a personal license which is about 200$ canadian/u.se meant the Personal License but just didn't say it, and in the United States it's $120. $200 in Canada.
i am guessing that the no money for the free edition would include no money from any advertisements because you'd still be making money off the gameot necessarily. Perhaps advertisements in the same page in which your game is embedded, but just because your game is on your website doesn't mean you can't continue to make money off of advertisements, it just means don't put the advertisements on the page with the game itself.
This can be argued, I'm sure, but that's my understanding.
you may also actually want to just find a website or store/government branch depending on where you live and getting the game's name and properties e.i characters, backrounds, etc. copyrighted because in a lot of places you do have to pay for copyrightgain, not necessarily. Fimbul is right, all you would need to do for the most basic of legal protection is what he suggested. You may be thinking of trademarking.
and [a copyright] for you to commercially sell it, since it would be digital download you would be catering to all or most of the worlds countries and continents meaning you'd have to get it copyrighted in every country.. No. But it helps if you go through the process of properly legally protecting your assets.
the best way to do this is to just post it on the scirra arcade as a free to play game or find a place/website that would cover all the copyright issues and or charges if they apply... No.
not only would you be sued you would be frowned upon by many considering that your making money and not giving any to scirra. If you wanted to its not illegal to purpose to scirra an offer of which you dont buy the license but can sell games and they would get some of the prophet, of course it probable wouldn't happen since scirra's construct 2 is going like wildfire for indie publishers and is basically mainstream for most 2d game makers, publishers or not... No. It wouldn't be a heinous crime if he sold a game using the free version, but he probably wouldn't get very far with the event and effects limits.