Like the People's Choice Awards of petty hatred, determining which unfortunate Hollywood bigwigs are going to receive a Razzie is done by any regular Jane or Joe willing to cast a vote. That means that the dubious honor of publicly humiliating some filmmaker's already-public fuckup can be yours with little effort. All it takes is a quick visit to the Razzies website and a PayPal transaction. $40 buys you a year's worth of membership, while $500 gets you a lifetime membership. Depending on how therapeutic it is to officially register your hate for the Fifty Shades franchise, that's quite a bargain.
Beyond your ability to click on a banner, there are no criteria with which to gauge whether someone is worthy to pass judgment on the "worst" films of the year. You don't even have to have watched any of the movies to hate-vote them into "winning" a joke award for shittiness. Worse yet, the voters can be completely anonymous, so all manner of spiteful motivations could be lurking behind somebody's $40 vote. For all we know, Ben Affleck has been secretly campaigning for years to get Matt Damon nominated for Worst Actor Awards (when he could have used that money to finance a Stuck On You sequel and guaranteed that nomination).