Tutorials are cool and everything but there are already loads of those available for construct and many cap examples also which are free. Usually the examples are documented well with comments and so there is not even any need to watch a video tutorial to make a simple space game etc.
Also with free file hosting sites there are only a few i actually trust like box.net and dropbox as the others usually have a load of popup adverts and have been known to give people viruses etc, i simply don't click a link if not forum hosted and it's another one of them. I am guessing other people will have a similar view also.
To be honest though i don't really think tutorials are a good way to make money. Usually they are made to help people rather than profit from them. You should probably just start making games instead and try to sell those, you could then have tutorials how to make various things from the games to help promote and boost the game sales.