As far as I know you wont be penalized unless you are a straight up spammer. But I've seen lots of businesses give "updates" and such.
People have to "follow" you to get your updates. So you could have people sign up to the company twitter and they would get updates that way. Its been done before
People have to "follow" you to get your updates. So you could have people sign up to the company twitter and they would get updates that way. Its been done before