The sponsored link [pictured] will take you to a new page where you'll need to sing up with Bing's Rewards program, which involves downloading a free toolbar. This toolbar is only available to users (and therefore so is the offer) who are using Internet Explorer - sorry Chrome, Firefox, etc. users. Also, you won't be able to take advantage of this offer if you're on a Mac. The deal goes like this - install the toolbar, register for a Rewards account, and make one search using the toolbar.
After allowing up to 15 minutes for the Farm Cash to appear in your account (says Zynga), you should be able to refresh your FarmVille game page to see your free 30 Farm Cash in your account. This is a great opportunity, to say the least, to really rack up some quick and easy Farm Cash on your account, even if you choose not to use the Bing Rewards Toolbar in the future (you can even uninstall it if you want). If you've already signed up for their toolbar in the past, simply make a new account to take advantage of this great offer.
There's no telling how long this promotion will be available, so make sure to sign up fast so that you don't miss out.
Will you download the Bing Rewards Toolbar to earn 30 free Farm Cash in FarmVille? Let us know in the comments.