In the past, we have seen Disney offering tickets for the parade taping to CMs and their families, to AP holders. And even then, the AP people had to sign up and were then given time/date to be there. The parade viewing slots went very quickly...then the other requests were put into the act taping slots.
We have also seen Disney allow people in, general public, to stand along the route. But I think those spots are pretty much the spots towards the back and along less desirable spots.
The parade taping is somewhat boring, and lengthy. It can take over 3 hrs!!! The parade will get to your 'spot', then go back again, and repeat...until they get the 'perfect' shot!! And you are expected to, on demand, show great enthusiasm.
I have done the Castle forecourt show tapings several times now. I doubt I would do it again unless it was an act I really loved!!! You get there early, you stand around for hours. People try to shove past you to get closer to the front. I actually got to watch as a 'pageant mom' pushed her girls forward..about 50'!!! She kept saying...'Oh, these are pageant winners. They should be up front since they are sooooo pretty. The camera will love them!!!' And people actually allowed them to do that!!! Sure they were cute little girls but there were plenty of cute little girls way back in the crowd. Sadly, those little girls had polite parents!!
The funny thing was that at the end of my 3.5 hr stint, I headed out of MK. As I left, I could hear them looking for more people to fill in the crowd in front of the Castle...our first group had left a ton of empty spots!!! But, the knees got a bit sore after standing in that one place for over 3 hrs...all for about 20 actual minutes of performance time!!!
Then, I've headed to MK on that Saturday, despite knowing it was a bad idea, in late afternoon. We got there, walked around for about 30 mins and practically ran out of MK!! It was mobbed. Add the taping people to the regular Saturday crowds and you have a nightmare!!