I was looking for a donate button to the Zorin Project and that was not very easy to find. Only through forum search pointed me to the "About" page which contained a Donate button.
My suggestion is: Put a donate button in the upper header of Zorin Homepage.
I just canceled my eOS monthly donation payment and want to support Zorin OS instead from next month.
Maybe the Zorin devs like to keep donations a more low key affair, not like Bob Geldorf's infamous plea on the Live Aid charity event "Give us your ...money!".