Limits of Spam restrictions (I want to tell many people the same thing)

I have a product that is related to about 150 tweets/retweets in the past week, and would like to @reply to those tweeters about it, but am curious if this small level of activity falls within the "numerous duplicate @replies" portion of the spam guidelines. Do I have to make each reply unique to be able to add to the conversation and not get blocked?