The sample screen names that I am using for testing are cnet, bbctech, cnbc, forbestech. And here is the set of keys I have been using :
[cut keys]
The way we are doing it is we are switching the set of keys after every 15 mins to avoid hitting the rate limits. But since this problem has begun I have been using above keys for testing purpose.
The API calls are taking as long as 15-30 mins to respond. It was working fine over two years. Suddenly since last two weeks we have been experiencing this issue. And we are using LINQToTwitter library. We need immediate help. Thank you.