I question the legality of Fiverr doing this.
For example, any public rating through any other service does not have "anonymous" or private reviews that the retailer or individual is unable to view/react to.
Look at your credit score. Imagine if they said you have creditors that reported negative things, but they are not going to tell you who or what those things are. That is basically what Fiverr is doing at this point. It is impossible for a seller to improve on service if they don't know the details. This drastically affects our employment/sales, just as a credit score would should you apply for a job and they check that.
If its a public score, then the reviews should be public as well (or at least viewable by the seller). Will see what happens when this rolls out on the 15th. But I smell a class action lawsuit coming because you can't have a public rating without providing the full details of that rating to the individual.
While Fiverr services worldwide, they would fall under specific laws for anyone in the USA using their service as a buyer, or seller. The FTC would handle such a case I believe.