Likes/upvotes are one of the major problems with social media. They incentivize people to not say what they think, but what they (subconsciously) think will get them the most likes (endorphins). It creates a hive-mind mentality where all social interactions degenerate towards the lowest common denominator.
Zaps are even worse, since in addition to dopamine, people are also being incentivized with actual money. It's the worst aspect of social media, but on steroids.