To deepen your relationship with your following, you must know who your following is and what they are all about. Once this has been accomplished, communication may commence. You should launch and online survey or poll either in your social channels or as embedded in your blog. This action serves to monitor overall satisfaction and interest your following has in your events and fundraisers. It also lets them the understand importance of your cause and the reasons why donors contribute to your cause. The online survey can also allow you to determine the areas and issues of interest of your following.
Zoomerang is a great online poll platform and has a non-profit organization discount on their pro account. Their homepage looks like this.