Latest Update! Coming June, 2018, a new United States based Cryto Exchange with a lot of resources behind it is going live. Guess who's user authenticaiton they will be using? Guess what token will be trading on their system? That's right, it's preCharge!
Join their Newsletter for updates!
https://www.threebx.com/Support preCharge and support threebx with one signup.
Also
https://www.bitfindr.nl/Cheers