Please, please, please don’t just drop an ad/PR bit for your product into my tweet stream. One, it’s not nice, even if you didn’t intend not to be nice. Two, an ad/PR bit sent cold to my tweet stream will likely get you muted or blocked because you’ve shown me that you consider me a mark, which I don’t appreciate. Three, if you do it to enough people other than me, then you’re spamming. Which will likely get you blocked and reported by a number of people.
Which is to say that your ad/PR pitch will fail, which is the opposite of what you want.
This does not mean that your business account can’t tweet at me or talk to me — I get that all the time, and mostly it’s fun, and indeed a good corporate Twitter presence goes a long way with me (see: here, where a nicely laconic response to my frustration with a company’s product was on my mind when I bought the replacement product, also from that company (the replacement product works just fine)). But there is a difference between conversing with me — even while promoting your product — and just dropping an ad/PR pitch into my tweet stream.
If you’re a company who is hoping for me to promote a product of yours, via retweet or mention, first, read my policy on retweets, and second, outside of retweets the best way to reach me in terms of product awareness is through email. Yes, lots of businesses and publicists already do this, you won’t be alone. Dropping an ad/PR bit into my Twitter stream doesn’t work because I will mute it. I don’t mute PR pitches in my email. Email is where the pitches are supposed to be. In fact, I even have a publicity policy.
(Don’t send ads to my email, however. Those will just get shunted into the spam folder.)
In short: My tweet stream is not for company ads or pitches. Don’t make me mute or block you, it’ll just annoy the both of us. Thanks.