You're saying that having the gamemodes up in CA would bring back players to CA..?
Theoretically, your plan is pretty good. But in practice, I can see it failing.
How would you get people to know that CA Gamemodes were back up?
Announcements? They would have to run 24/7, adding to the already flood-like chat.
Livestreams? The Admins n' stuff don't seem to have enough time for those, plus not nearly enough people watch them.
Using the new YT channel? It's too new, too little media attention.
Giveaways? Let's be honest, people only want the free donor.
You would have to very quickly gather enough support and players for CA in order to support the servers that would be required to run all the gamemodes. Like, probably within a month, otherwise it'll be draining funds from the other regions. It must be self-sufficient in terms of donations. Right now there's.. how many players that play on CA? And of those, how many actually donate?