While I haven't seen any numbers, I think that there are alot of these bots. I have even less of an idea if any of them are contextual alot. Right before I was suspended, I believe that there was a report that came out that suggested that a large percentage of Twitter's traffic was caused by spam bots like these. I'll see if I can find the report and verify the numbers!
What I do know is that there are certain keywords that put you in line to be tweeted at for some product or website. Some keywords have more bots trolling the search API than others.
UPDATE: I wasn't able to find the report I was looking for, but I did find the following blog post. It contains a graph that shows that SPAM used to account for about 10% of Twitter's traffic. This number is now below 1%.
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While I haven't seen any numbers, I think that there are alot of these bots. I have even less of an idea if any of them are contextual alot. Right before I was suspended, I believe that there was a report that came out that suggested that a large percentage of Twitter's traffic was caused by spam bots like these. I'll see if I can find the report and verify the numbers!
What I do know is that there are certain keywords that put you in line to be tweeted at for some product or website. Some keywords have more bots trolling the search API than others.
UPDATE: I wasn't able to find the report I was looking for, but I did find the following blog post. It contains a graph that shows that SPAM used to account for about 10% of Twitter's traffic. This number is now below 1%.
http://blog.twitter.com/2010/03/state-of-twitter-spam.html