yes you probably have noticed that alot of high profile twitter pages are high PR, but do you think any of that link juice is flowing to their page creator company home pages?? Of course not, it's an "external nofollow", that doesn't make any sense does it? you little worker bee have worked so hard to build a GRAND & Shining twitter page and not even one little thank you link? thanks a lot Twitter
oh gosh, there every reason behind every action. The nofollow rule is to prevent link juices from flowing out of twitter domain and for SEO purpose. Imagine link spammers will start mass creating accounts and spam their link on each account. Twitter sub pages gain page ranks very easily.
They are trying their hardest it seems and there are a number of options online that can help you privatize your Twitter and help keep your content relevant, making sure it goes out to the right people.
Most social networking sites are nofollow - twitter, facebook, myspace - they're not meant to be used for linkbuilding, that's not what the sites are for. They get swamped in spam already, the last thing they need is to offer an incentive to spammers.
There's still spammers on Twitter by the truck loads. They are looking for direct marketing though - not for SEO purposes.
because real people with real twitter accounts dont care about no follow - they click the links they are interested in. this is what twitter is about - not another dump site for links in hope for cheap backlinks ...
I have found twitter a useless tool for marketing. I am still not sure why people use twitter at all.