We'll definitely take your feedback into account for our next round of training.
Permanent PINs are, by design, less secure than the two-factor authentication we request by sending you an email. While it might be more convenient, it gives lots of other people, including friends and family who could reasonably guess a PIN you'd set, complete access to your Ting account, including porting phone numbers away, adding lines, charging things to your card and turning on costly services like international roaming (off by default).
This may not be a concern for you specifically, but our PIN system is absolutely intentional and designed so that only the person who set up the Ting account is the one we talk to -- not a friend, spouse or relative who only has a phone on the account. We take account security very seriously. That's why we're not proactively promoting permanent PINs as an option.
The limit you hit, designed to prevent bill shock, is by design and is always under review by our team. Given our current data prices, it's unusual to hit the pre-set limit without knowing it's there. It's set up on every Ting account under the "Caps and Alerts" section of your Ting dashboard. We do it that way because the last thing we want is someone to sign up for Ting thinking they'll save money, as they're new to our "pay per bucket" system and get a bill for a huge chunk of data they weren't even aware they were using. The cap can be removed by you on your Ting dashboard, or it can be removed by any of our agents. Once removed, please understand there's nothing preventing your Ting bill from exceeding that cap, which could result in higher bills.
There is another safety lock on our end (not on your dashboard) if you exceed another significant amount (10GB) of data, and that can be removed by any Ting agent. However, if you'll regularly hit this second safety lock, understand that data alone on Ting then runs you ~$100 (10GB at $10/GB), not including anything calls, messages or line fees.
If you've got further questions, please feel free to follow up with me here or send another email to firstname.lastname@example.org asking for me specifically. I can follow up with account specifics there.