I spoke with a couple of recruiters recently who don't have this as a sourcing tool in their armoury! Apart from its hilariously catchy name, followerwonk gives you the opportunity to search Twitter bio's intuitively be it by location or what they are talking about... if you consider yourself a sourcer and dont have followerwonk yet, give this article a read and give it a try!
The best way to search Twitter users’ bios is to use ‘Followerwonk’, rather than the Twitter platform itself. The tool is free to use, although it does restrict some features at the basic level. Despite this, you can still search the entire Twitter network with a free account, and it’s an excellent way for you to find potential candidates.