In this file, you can read about where and how people use Rubberduck:
I've been using VBA for as long as I can remember, but never knew anything other than a Making-It-Work coding style. I didn't give any thought to structuring my code. Needless to say, I wasn't progressing very fast at all. That changed early last year when I decided to improve my coding knowledge. I luckily found Rubberduck, and it’s taught me more in a year than I’d have been able to discover flying solo, through both using Rubberduck and hanging out at the war pond.
In addition to being a user of Rubberduck, I’m also a contributor. To show my appreciation for what RD and all other ducks at the pond have helped me learn I took the initiative to learn C# and help with the codebase. When I first started I didn't think I'd be able to successfully contribute, hint hint anyone can contribute. Just remember that you #GottaStartsSomewhere.