i will give u an answer but dont count this like 100% sure...i played on czechgamers 2 servers ago and it was working like this:
GoldenApiga = donation
Apiga = drops from champions mobs located in the fortress,is just a mini raidboss that you can kill with 2-4 ppl
with both of them you can buy hats and some other stuff...but nothing that ruin gameplay so much