Thought I'd post this here. Another day in our struggle of working on an increasingly hostile ecosystem for Twitter app developers. We were also IP blocked without notice twice in the 2 weeks beforehand. I had to send a support request to get us unblocked each time. We receive no notice and do nothing wrong, so are unblocked once our request is received. We have all kinds of protection on our end to stop agressive API activity being performed through our app, but that doesn't seem to help. Twitter provide us with no information about what we can do to stop being blocked.
It's frustrating.