I have (almost) all the numbers. I can tell you what I spent, to the dollar. I can tell you about the traffic to the site, what they did, what was successful and what wasn't. I can't tell you how much time I spent on it because it varied so drastically over the past year. It ranged from 10 hours a week to 0 hours a week. It just depended on how busy things were at work and with the fam. (EDIT: my wife tells me it was more than 10 hours a week. ;) )
The point of the post wasn't to give detailed numbers, but just to generally convey what I took away from it. Whether or not you know my numbers doesn't change what I learned. And just because I didn't mention it in the post doesn't mean I don't have it, that is a large assumption. I'm not sure how it makes the post meaningless. Perhaps you can't tell if you can trust it or not because you can't measure it? But even if there were numbers, that doesn't tell you whether you can trust it any more or less, so perhaps that's not it.
I wrote the retrospective post about the things I care about, not the things my customers cared about. You're absolutely right that almost all the stuff I listed is meaningless to my customers, and I never even mentioned it to them -- they don't care! :)
Also, I didn't go into it in the post (I was going for something shorter and readable/consumable) but I had two customers. Small businesses listing coupons, and people using the site looking for coupons. I thought about it from both perspectives every moment I worked on it. I geeked out about how I was doing it, but never lost sight of my customers. Sorry if that wasn't clear in the post.
You're also absolutely right that it was a poor choice of spaces. That was a huge lesson I learned. :)
So to summarize, take it for what you think it's worth. There's no law that says you have to read my lessons learned and apply them. But they are lessons I learned, regardless. Thx for reading!