Pure TalkUSA now requires an Account PIN to port out from them. It can be set up or changed by logging in and going to https://www.puretalkusa.com/account/profile. This is the PIN that needs to be entered on Ting's form for requesting a port. It still appears that Pure's process is substantially manual, so you will probably have to call Pure support for their Porting Department to approve the port. When you do that, be ready with your Account Number, Account PIN and the answers to all your security questions. If you make a mistake in the PIN entered on Ting's form, call Ting support to have them reset your request.
Porting to Ting from Pure TalkUSA