I've been adding a "Why does this matter " section. A lot of people don't even know these apps exist, and even then the answer is usually "They should just use the main one". Reading through yours, just make sure it'll hold up to that scrutiny. I usually have to add in something along the lines of "Even if you use the main app this will affect the communities with reasons X, Y, and Z" like the moderator bit.
Also be ready for a dozen "Lemmy sux" comments, which I've been directing honestly. "Yes, it has it's flaws, but all alternatives do. I think Lemmy has promise though, and any shortcomings right now can be overcome in time". Reddit thrives on arguments like "No it doesn't, lemmy is awesome" and then a comment thread 30 comments long. Keep it on point, "It has pros and cons for sure, but I mostly want us to stay focused on Reddit's choices"