It seems odd for a well known polling firm to resort to crowd funding. Not that there is anything wrong with crowd funding but from how the proposal sounds it seems as if they have limited cash to poll and that is not good for a firm that has been around for awhile.
They might as well just send an email to Trump's supporters: "The President's best polling firm needs your help! Only you can help us accurately poll the nation's greatest President! Let's defy the fake news and fake negative polls! Enter your credit card information and the amount of your donation below."