I read an interesting post over on Opinionated Markets today titled 'Will Spam Kill Twitter?'.
I've noticed a recent tactic - which I deplore - that works like this:
1. Let's say you make widgets.
2. You do a Tweetscan for 'widget'
3. You follow anyone who uses that term, hoping they follow you back.
4. You can then send them your marketing messages via Twitter.
I'm sorry, but you'll never find me engaging in such a tactic, and you can't hire me to do it for you.
I do think that Tweetscan is a legitimate tool. It allows you to keep your finger on the pulse of your market and reputation. I also think it is legitimate to reach out to a Twitter user who has twittered about a bad experience with your product or service.
I also think it's very legitimate to set up a Twitter account that your customers can subscribe to and get your updates. Then it's THEIR choice.