It is a scam. I've seen escorts I know personally whose numbers have shown up on that site.
There are numerous sites like this. They are scams in a way but they can also be used as a tool in another way.
They are scams because they give you the
impression that the SP is not trustworthy or has been busted but when you look at it closely, they don't actually say it, they ask the question (ex.: "Is this escort affiliated with law enforcement?"). Then they want you to click on their links (reviews, safe encounters,....) to promote their sites. Because of the false impression, using other people infos for content and because they're phishing for your clicks, they are scams.
The site is just a crawler program that goes through all the free ads sites and collect every ad they find. On one of these site, there is even an entry for you tianna:
link. It's because you must have posted a free ad (or somebody did) on last December 12th somewhere (they don't disclose from which site they collected the information). Anyone who post a free ad will end up on that site.
After looking at the site more deeply, you quickly realise that it's all bs and they actually don't tell anything about the security or trustworthiness of any SP anywhere - it's just promoting their own sites by phishing.
But it can be usefull in this way: the crawler will collect all the ads it finds for a certain phone number and 'collate' all the information on one page. If a SP is posting multiple ads which are different in content and photos, then it's all collected on this one page - you see all the photos from all the ads, all the ages used (sometime this is funny as the ages varies from ad to ad), texts and you see a history of their ads. Here is a totally random ad I picked to see an example of collating info:
link
You will also detect SP that are supposedly independent but when looking up the phone number, you see 72 ads promoting 35 different girls... like a ghost agency.