Thanks for the feedback - Twitter does only return 5000 followers and following and I'll try to add support for high-profile people in the future. There is the issue of the 150 requests per hour limit that Twitter has per IP which means that it can't work on really big people without using a service like DataSift.
Have you actually read the DataSift TOS? I did, and it was completely unusable for what I wanted. (Last year, may have changed.) Basically if you payed them and extracted info you then couldn't make it publicly available. You also had to charge anyone you gave the information to. Which kinda makes sense, but rules out a lot of apps.
