I have no experience with Twitter. Before asking anything this is what I would like to accomplish: That a twitter member would be able to follow a product category updates in an ad site and only in that category. So the site's robot would post to twitter any new ad in that category using the the API. There are more than two thousand categories.
Now the question: Is there a way to create different kinds of posts for a single user (the site's bot) that can be followed individually? Or must I create more than two thousand users? If this use is against any Twitter policy please excuse me as I have no experience with it. Regards, Clodoaldo