I don't understand your point, middo. I think most people were aware of their income. Anyone buying property in Cambridge, MA, yeah, we get it. Even if not, let's let it slide as a miscommunication. The debate seems to be whether (a) they (well, the woman, at least) falsely portrayed themselves to be retired to sell books, and (b) whether they're actually models of frugality, as the title of the blog suggests.
The information that you linked to, combined with the upthread breakdown that someone did suggests they've tripled their (non-mortgage) spending in the last five years. This, combined with the fact that the lady is shilling $300 vacuums this month, suggests to me that they're basically an advertisement badly disguised as a rural paradise fantasy.
As for the fake-retiring bit, I'm sure someone must have already brought this up, but I found this book synopsis:
The deeply personal story of why award-winning personal finance blogger Elizabeth Willard Thames abandoned a successful career in the city and embraced extreme frugality in order to create a more meaningful, purpose-driven life and retire to a homestead in the woods at age thirty-two
Source: The BACK COVER OF THE BOOK (per US Amazon's website) - Not linking to it, but its right there.
This is... unambiguous to me.
Regardless, I'm not sure how circling the particulars is going to help anyone. She's already been brigaded online; all the most helpful reviews are calling her out for the bullshit. She made a business decision (or her publisher pushed her around) to go for mass-market appeal, knowing the lack of authenticity would largely cook her with the FI community. Unfortunately, the end result didn't do nearly as well as, say, JL Collins's (which, I just discovered, is free for Kindle Unlimited readers). Even so, I still respect the effort to try and get the critical mass for her brand with the book. She took a shot, which is something a risk-averse crowd like this should at least respect.