I am also wonder why some of the exchangers really needs ID's and the proof of residency where it is digital money where we cant understand why they keep on getting our ID's but for what right? So, instead of verifying something I do trade also in some exchanges that are not going to give ID's because it is not only curiousness but it's also hassle since you need to verify it with selfies and wait for a bout 3-4 days or sometimes waiting is just a week. Well, U dont know there reason why they keep on collecting ID proofs.