I've have between 8 and 20 goldfinches visiting the feeders in my garden every day.
So many that they're going through sunflower hearts so fast that they need topping up twice a day.
They only use the niger seeds when the sunflower hearts are empty and really turn their noses up at black sunflower seeds where they've got to do some work in cracking the shells!.
There are about 10 greenfinches and up to 4 siskins visting daily.
Here are a couple of shots I took of a goldfinch amidst a sprig of blackthorn which I fixed to the feeder.