The number next to the star is the total FB (score) received over the course of the membership - if you look at my FB profile, you will see that I've received a total of 1720 FB, but multiple purchases during the same week will only provide 1 FB point, so my actual score is 1289. FB received this year = 313, and my percentage is at 100% because I have received FB in the last 12 months. You can have one million FB, but if none were issued in the last 12 months, the percentage will be 0%. 1 pos FB will result in 100%

eBay do still remove all FB left by recently registered members if they are made NARU (not a registered user) but the FB will disappear completely. It's happened to me a few times, and once I was able to see which member it was because the transaction was still showing in my recent sales history on eBay.