Same as Xenocythe here. I read most of your post, but don't need the code, so didn't check it out. This is a very specific bit of code you're kindly offering up really, so I can't imagine many people needing it.
Also, if you win a compo like a banner compo, you're basically putting your artwork up for scrutiny. People won't just sit back and go "oh, this one won so it must be the best". People who don't like your banner are going to express their opinions. The same would've happened for anybody and happens for any artwork put into the public domain. I personally think a lot of those banners were crap. I've dissed a few of em!
I doubt there is a conspiracy here.
If you provide code that is anything other than generic noob material, you're inadvertently aiming it at more experienced coders, who often are able to do it themselves, or don't troll the forums eating up all code snippets made available. And btw, if you win a compo that you founded, you're basically stepping into the firing line. There's a reason why competitions always say "This offer is not available to employees of [competition company]" in the small print, to avoid that sort of thing.
Hope that helps man. Nobody's out to get you!