I'm fine with allowing sytrus, the only downside is people that haven't bought it (and don't have the demo) will have to render to .wav or .mp3 and save the score without the instrument.
Instead of completely banning things, we could also limit them to so many tracks. You can use sytrus, wasp, and whatever else, but only on up to three channels.
If this *is* applied, I'd like this to come into effect next round instead of this one. We've already had entries before this started to become an issue.