2. You should be able to export in ways other than putting it on the site.
You can actually do that. This post explains how to do it in detail: http://scratch.mit.edu/forums/viewtopic.php?pid=763#p763
I know what you're thinking! "Neptune! Get rid of those filthy advertisements and give us back the Zarathustra siggy, you horrible person!" Well, don't worry about it, the Zara siggy will be back soon, new and improved! ^^ Meanwhile, just do what the sig tells you to. >.>