Personally, I want to be able to trust the community of people I work with.
Would it be good to somehow be able to trust the entire community? Yeah, I guess. But unless X karma is very high, I strongly predict that codes would be entered. I do not think we can trust—or should realistically expect to be able to trust—so many people. Many people have posted over the years. Probably, some high karma long-time users are no longer aligned with community goals and would enjoy watching the post-launch drama.
Why only 100 members? Shouldn't we want to be able to trust our entire community?
Why not give codes to everyone or everyone who'd registered before X date with X karma to avoid trolls?
More trustworthy people is good but it doesn't follow that acting as if more people are trustworthy is good.