I think most of these "features" are there to make people addicted to games grind hard for nothing, which I think is not needed here and would be annoying but it couldn't be enforced to participate in this stuff beacuse you can do anything in nostr and you cannot be forced into this things by "a platform owner". Some people just need to go out and touch some grass and find events, and achivements in real life.
Discussion
Zaps and reactions are gamification already. If implement well, we would use most of those features without even noticing.
I'd like to disagree that they are gamifications, as reactions are a simple and quick way to give feedback and zaps are great value 4 value option. But you do you man, if people want to participate let them, if you want to build it into the app do it is your app.