Should I resume using twitter?

After a reasonably long experimental use of Twitter, I went on a hiatus from Twitter about eighteen months ago since I felt it wasn't a very productive or profitable use of my time. So far, I haven't regretted that decision and had remained focused on real, billable work since then. But now I am once more back on the street looking for work, so now it seems reasonable to question whether anything has changed enough to warrant my return to Twitter. I'll give the question some thought over the next few weeks, although my current feeling is that Twitter would still be a relative waste of my limited time and resources.

 

Can anybody offer any personal experiences that show clearly that Twitter had a dramatically positive ROI for their efforts?

-- Jack Krupansky