I want to thank Hpulley(from the MAL news forums) for helping me find a method to easily find most series that include an event ticket.
This also might not include all series that have event tickets, if I do miss any. Feel free to point it out. Some series migth also have event tickets in V2/3+, so I will use a different volume for those.
V1 -> V2+(depending on when it drops)
6.3k -> 1.1k Super Sonico(down -83%)
2.6k -> 1.0k Hamatora(v3 goes down -62%)
4.3k -> 1.8k Noragami(v3 goes down -59%)
8.3k -> 4.9k Hoozuki no Reitetsu(down -41%)
4.5k -> 2.7k Mikakunin de Shinkoukei(down -40%)
3.3k -> 2.0k Nisekoi(down -40%)
2.4k -> 1.5k Sakura Trick(down -37%)
2.1k -> 1.4k Space Dandy(down -33%)