There's already been a lot of discussion of this issue, such as in the following threads:
http://eccie.net/showthread.php?t=1910196
http://eccie.net/showthread.php?t=1908662
http://eccie.net/showthread.php?t=515506
http://eccie.net/showthread.php?t=1837284
You wrote: "Something that has been discounted as not possible over and over through the years these site[s] have existed." By "something" I assume you mean a hobbyist or provider being charged with a prostitution offense based ONLY on a review. I'm not sure anyone has ever asserted such a phenomenon is "not possible." I never have. Regarding criminal offenses generally, I've repeatedly written here that anyone can be charged with anything anywhere. In the stickied thread:
"Can a review be used as evidence in a prostitution case?"
...I concluded:
"The bottom line is: If you hobby, you're engaging in criminal activity. Engaging in criminal activity involves the risk of criminal prosecution therefor. If you want to lessen your risk, don't write reviews. But you'd have to be borderline paranoid to think that way. Instead, write reviews, but be discreet and use common sense when you do so."
See:
http://eccie.net/showpost.php?p=3006929&postcount=1
I've also written that I've never heard of a provider or hobbyist being charged with a crime for ONLY writing a review. I'll modify my statement by saying I've read that hobbyists in Seattle were arrested for only writing a review, but I found the assertions not credible, as I explain, below.
Having read the Reason blog piece you cite from December 13, 2016, and a Reason blog piece from September 2016:
"The Truth About the Biggest U.S. Sex Trafficking Story of the Year"
...and posts by the Seattle-based provider CompanionEstella, I am far from convinced that any hobbyist in Seattle has ever been charged for ONLY writing a review. My belief is based on the following reasons:
1. The two articles, despite their headlines and hyperbole, describe OTHER conduct ALL the charged hobbyists engaged in along with writing reviews.
2. As near as I can determine, other than the one blogger and CompanionEstella, no one has written arguing the charged hobbyists in Seattle ONLY wrote reviews. On the other hand, numerous REPUTABLE news agencies have written that the charged Seattle hobbyists engaged in other conduct besides writing reviews. Estella's response is that "LE lied to the press," but when weighing multiple news articles versus a provider's post on Eccie based on third-hand or even fourth-hand hearsay, I tend to believe the news articles.
3. CompanionEstella's factual assertions aren't credible to me. It appears that most of what she says is based on what she calls "inside information" from what a client told her. But what a hobbyist tells a provider can be far from the golden truth. For example, she has repeatedly asserted that her client wrote a review three years ago, never posted it, and yet was charged with felony promotion of prostitution. That assertion smells like steaming bullshit to me. Estella also asserted that "hundreds" of men would be charged with felonies in Seattle on December 14, 2016 for ONLY writing reviews, when, in reality, only 12 men were charged for writing reviews AND other conduct, as stated in the more recent Reason article.
4. Estella stated she's read criminal complaints in the Seattle cases and they stated the defendant only wrote a review. However, I searched and I found no such complaints.
5. Reading the "Ask a Provider Anything" thread, Estella repeatedly expresses a concern about hobbyists writing reviews being charged with crimes, based on the Seattle cases. Yet her website has links to reviews IN SEATTLE, where she claims "hundreds" of men are being busted for ONLY writing reviews, and her Eccie showcase has links to reviews. Estella can't be sincerely concerned about her customers being busted for writing reviews and use the reviews to promote her business, in my opinion.
Is it POSSIBLE a hobbyist in Seattle was arrested ONLY for writing a review? OF COURSE. ANYTHING IS POSSIBLE. But I know of no credible evidence to support it.
Finally, one of the four threads I posted above includes a discussion of the Washington state prostitution statute versus the Texas prostitution statute. I concluded that the Washington law was VERY vague regarding promoting prostitution. I think it's highly unlikely that a hobbyist or provider could be charged with promoting prostitution under the Texas statute for ONLY writing a review.