BTCJam periodically updates the credit scoring algorithm as well is always monitoring behavior of users on the platform. In general, it's always a good idea to verify more documents, connect social accounts and get more references, which will tend (do not guarantee) to increase your credit score.
Everything ok what I don't understand your why you algorithm increase credit socre someone that even proof their ID and I proving everything except PayPal and eBay (I don't have any of that services) they put me a D. Weird is the first word but unjust is a better one.