Ever since Twitter launched the API loads of people have been delivering cool applications and a side benefit was that the links to those applications were not nofollow links. The API links are under each tweet where it says something like:
3 minutes ago from TweetDeck
Then a couple of SEO bloggers decided to blog about How to Get DoFollow Links on Twitter and sure enough a week later those links were nofollowed meaning that it’s now totally impossible to get a decent link from Twitter even in your profile.
We run a popular Twitter app which has been used over 100,000 times which means there are over 100,000 links – all of which are worthless from an SEO point of view. Of course the app wasn’t ever designed for SEO but it’s still not nice to lose that many links in one day.
The problem with blogging about SEO is you can never give away any tips that actually work because Google and any sites involved will close the loopholes within days. Mention a great site that gives out links and it won’t last the week.
Good tips no longer get shared on blogs as people move to private forums and internal discussions instead.
Perhaps that’s the reason most big blogs stop writing decent tips and start to just publish the latest news or generic marketing type content instead.