I know that
Escape advertises in every issue so they were sure to be in the article.
Scamp and
Casita have advertised and list themselves in the yearly Buyer's Guide. Lil' Snoozy doesn't do either and they weren't listed. Thinking it through, it is obvious and makes sense to only review people that advertise with the company.
Gosh, the magazine is about 80% ads. Sadly, it won't be long and paper magazines will be history.