@Nemory's snaptcha workaround. (REUP because pastebin removed it.)

snaptcha.txt

This is the registration process!! I hope this helps.

----------------------- 1st REGISTER REQUEST /bq/register -----------------------

age=29&timestamp=1391540459507&req_token=930da8572fd159586e7a5feef9a00534a8e24d8c19f86a8cd9b42e14d8c5182b&email=nemoryoliver%40gmail.com&birthday=1985-02-05&password=DhjkLmnOP2%7B%7D

failed: HTTP CODE: 401 / 403

{"message":"That email is already associated with a username.","status":-201,"logged":false}

success: HTTP CODE: 200

{"email":"noooomad@gmail.com","should_send_text_to_verify_number":false,"snapchat_phone_number":"+18052501351","captcha":{"prompt":"Select all images containing a ghost."},"auth_token":"6e84192e-f9cd-488a-a930-fda8fa6ccaf6","logged":true}

----------------------- 2nd REGISTER REQUEST : GET captcha /bq/get_captcha -----------------------

username=noooomad%40gmail.com&timestamp=1391540641248&req_token=55257f1c35c8661d59ca9efb62fd9d3264cc0c881e475a98a573da0ad5020ba0

failed: HTTP CODE: 401 / 403

success: ZIP FILE

----------------------- 3rd REGISTER REQUEST : SOLVE captcha /bq/solve_captcha -----------------------

captcha_solution=110000000&captcha_id=noooomad%40gmail.com%7E1391540800633&username=noooomad%40gmail.com&timestamp=1391540881872&req_token=552d9e1e14a8513d59bd1bf062fbc89279ca0c841e772a9365732f0ad30209f0

failed: HTTP CODE: 403

success: HTTP CODE: 200

----------------------- 4th REGISTER REQUEST /bq/register_username ------------------------

username=noooomad%40gmail.com&timestamp=1391540982114&req_token=552ecc116968653d59f296fc66f58a4264cf0c871e0bfa9ad573540ad70200b0&selected_username=nooooomad

success: HTTP CODE: 200

{"birthday":"1985-02-05","bests":[],"score":0,"number_of_best_friends":3,"received":0,"logged":true,"added_friends":[],"requests":[],"sent":0,"story_privacy":"FRIENDS","username":"nooooomad","snaps":[{"id":"642055391540983441r","sn":"teamsnapchat","t":10,"ts":1391540983441,"sts":1391540983441,"m":0,"st":1}],"friends":[{"can_see_custom_stories":true,"name":"nooooomad","display":"","type":0},{"can_see_custom_stories":true,"name":"teamsnapchat","display":"Team Snapchat","type":0}],"device_token":"","feature_settings":{"front_facing_flash":false,"replay_snaps":false,"special_text":false,"visual_filters":false,"smart_filters":false},"snap_p":1,"mobile_verification_key":"NjA1MTpub29vb29tYWQ\u003d","recents":["teamsnapchat"],"added_friends_timestamp":0,"notification_sound_setting":"OFF","searchable_by_phone_number":true,"snapchat_phone_number":"+17864088365","auth_token":"6e84192e-f9cd-488a-a930-fda8fa6ccaf6","image_caption":false,"current_timestamp":1391540984351,"can_view_mature_content":false,"email":"noooomad@gmail.com","should_send_text_to_verify_number":false,"should_call_to_verify_number":false,"mobile":""}