A lockout should only occur for using more information. If in the event you hit either of our rate limits, this would throw you a specific error explaining that your API requests are currently being refused rather than locking your account. In addition, the lockout rates are far above 70 requests in 30 minutes, so this would not have locked you out.
I can however submit the request to return an error message stating that the account is locked out due to too many invalid login attempts, vs the standard 'HTTP Status 401 - Unable to authenticate user xxxxxxxxx'
I apologize for any inconvenience that this has caused. Please let us know if you have any questions or concerns regarding this. Thanks.