It looks like they want you to actually provide something there first that has not been live before. Their application, though, includes stats on your current

It looks like they want you to actually provide something there first that has not been live before. Their application, though, includes stats on your current website, so I guess their plan is to focus on some new feature to be presented there for the first time. They also want you to explain how their conference is causing your company to accelerate development, etc. I don't see any downside in applying or getting the media attention of getting selected. One option: get selected, get the media attention, then forgo any radical high trajectory bubble bursting funding proposals, and then use that momentum to get into YC.