I'm fairly active on Twitter. I'm also a raving fan, enough to pay for a premium version if it were ever created. Features I would pay for: Personal analytics dashboard, some sort of auto-bookmarking/categorizing of my tweets with links, searchable archive of not only my tweets but the content I linked to, and more.<p>There are 3rd party apps that do something similar to archiving/auto-bookmarking: Trunkly was awesome, then they were acquired and integrated into Delicious (<a href="http://blog.delicious.com/2012/03/tweet-a-link-save-a-link/" rel="nofollow">http://blog.delicious.com/2012/03/tweet-a-link-save-a-link/</a>) and that is very cool. There are also amazing apps that provide personal social analytics. See <a href="http://www.simplymeasured.com" rel="nofollow">http://www.simplymeasured.com</a>. I'm on Twitter or using a Twitter client a lot. If these features were native to Twitter, they would be worth paying for.<p>I doubt I will switch to, or use, yet another social sharing platform similar to Twitter, let alone pay for it without having experienced it. Getting my friends to take the early adoption route alongside me seems unlikely too. Maybe a few of my friends would join, but a large majority would not.<p>Too many social networks have failed or aren't useful enough to me to invest any amount in. I won't be investing my money in a promise for something similar to another social network any time soon.