Do NOT use CPC campaigns at SponsoredTweets.com
https://twitter.com/LarryWentz/status/439577359016923136
That's right - I started a recent CPC campaign & have been bombarded with Fraudulent Clicks (over 3000 so far). I then check my CPC archive & see I was able to withdraw to my balance $36 but also see about $100 being held from 2011 ad campaigns (nonsense!). An additional $130 is being held from my most recent ad campaign that I'm getting screwed over on.
If you have ever used Sponsored Tweets - check your archived campaigns to see if you have money laying there or being held over an excessive time period.