What are /r/feederism's favorite Products & Services?

From 3.5 billion Reddit comments

This is the cover art for my weight gain forbidden romance novella that I recently published on Amazon!

Book blurb: Everyone struggles with their weight from time to time. The newest chemistry teacher at the university, Annie Keller, is no different. While most of her students don't notice or care, one of her repeat students definitely has. Come on a journey of discovery as Ian learns how many cookies he can cook in a semester while finding out just how deep his professor's weight issues run.

If you want to see what it might be like, you can read the first chapter here for free: https://www.deviantart.com/juxtaterrestrial/art/Weighted-Grades-Chapter-1-882050318

Then if you're so inclined, you can buy the book here: https://www.amazon.com/dp/B0979H18LZ

I put a ton of work into making a high quality product, so I hope you all enjoy it!