I (and others) have looked at Vivastreet-you might like to take a look at the threads containing these links.
Comparing adultwork with vivastreet
https://www.ukpunting.com/index.php?topic=182319.msg1919414#msg1919414and other posts in the thread also see viva street any gold in the dross
https://www.ukpunting.com/index.php?topic=190145.msg1981006#msg1981006but the bottom line is Adultwork at least has some sort of verification in place to attempt to see if the woman is who she says she is.
The moderation on Vivastreet is robot driven and is just to see that certain phrases (that might suggest sex is for sale-wtf?) do not appear in the ad. Which is why the "likes" list is so sparse If the Vivastreet profile corresponds to an AW profile then the girl is more likely to exist. Whether she is any good is a different matter.
I have looked at hundreds of Vivastreet ads and certain patterns emerge. Firstly there are prolific profile posters (Posted by-see top left of the ad) who post ads for numerous women and often reuse the same phone numbers. Clicking on the “posted by” you can sometimes see other ads. Be suspicious-these may be B&S.
Do a Google search on the phone number-this often brings up Vivastreet ads describing different girls in other locations, also it may bring up ads in scavenger sites-often for girls with different images, names, profiles. Avoid these I would say.
Do an image search (I use Google images) -especially on the ones showing over glamourous girls for that price point-this reveals photos pinched from other sites-other hooker sites, Instagram etc. Avoid.
Then there are the prices-if they are 60/100 half-hour/hour in an area where AW prices are 70/130 be suspicious. Those profiles which have different prices from most of the Vivastreet ads for your location might be more likely to be genuine.
My own experience of Vivastreet has been poor-often B&S, the genuine ones often don’t deliver-but TOFTT, after all YMMV.