Why did you choose to charge with a percentage model instead of a flat fee? If I'm a "hero" and offset double my footprint why should I be charged double for doing that? Is the cost to you as a business relative to the dollar amount I donate?
This sounds like a great idea. I would definitely be interest in a book of these. You're right that it feels like something you would pair with a textbook if you're trying to learn. But for me I would just want one as a fun book to have on my desk at work.
Why did you choose to charge with a percentage model instead of a flat fee? If I'm a "hero" and offset double my footprint why should I be charged double for doing that? Is the cost to you as a business relative to the dollar amount I donate?