What’s the criteria to become Top Rated seller on Fiverr?
Top rated sellers are hand picked by Fiverr.com staff. You won’t just get the Top Rated seller status automatically if you hit x amount of orders in x amount of time. This is not how it works.
Reading up on the topic and seeing comments on Forums relatd to Fiverr and microjobs it seems that most Top Rated sellers got promoted around 500 delivered orders and they all maintained a close to 100% rating. Somewhere near this threshold a Fiverr employee then manually reviews the profile and decide whether they select the seller to own the highly sought after Top Seller badge or not.