I'm very interested in CTF, but I don't know how it plays. I might love it, or it might be forgettable like the free-to-play 3v3.
It would make sense to offer CTF trials so I can find out if it's worth the platinum. Maybe give each account a limited number of games.
Or let me pay 5P to play unlimited games at my current level, which can go toward the full 20P if I decide to buy in. That way some PvP oriented people can drop 5P and just focus on PvP at their chosen level cap.