This has happened a few times for me.
I follow a company.
They start advertising on Twitter.
Now, every time I go to Twitter, their ad is at the top of the page. The same message. I've read it a dozen times. I do not want to keep reading it.
I have a choice, I can get rid of the ad by unfollowing them. I do it with regret, because there was a reason I chose to follow them. I am interested, and I want to keep up on what they're doing. So maybe I don't unfollow at first, or the second or third time. But eventually it seems I always do. I keep meaning to write this post to make sure Twitter and the advertisers understand this.
Because of this I am reluctant to advertise. I was thinking about doing it when I come out with a new product. I think Twitter could be part of my promotion, but...