Currently, @paradex has stopped XP transfers, probably due to a large number of bots posting orders to earn XP and then selling it on the secondary market for arbitrage. The specific method seems to be: posting orders themselves and then taking their own orders. Since it's 0 fee, they can earn XP without any loss. Scientists really know how to make money. @fiddybps1 also mentioned that they will investigate similar witch-like behaviors, and historical points might be deducted if found.