Hey there! I'm the one that uploaded the original dataset. I'm creating API endpoints that will easily allow you to do this. It should be completed in 1-2 weeks.
I did the same for my account and some comments are definitely missing... The first one that I cross-referenced is missing (5 month old and 1 point comment). But I have other comments with only 1 point and also 5 months old and those are there.
Thank you so much! I'd like to try it myself, but your link redirects me to some getting started page.
Any idea why some comments are missing? I haven't checked to see if they are all there, as far as I know they are.
I know that any in closed subreddits or comments that were removed by mods might be missing. But if you can access the comment's permalink without being signed in, then it should be in your data.