ToME: the Tales of Maj'Eyal

I was just wondering what the donation amounts are that differentiate a bronze donor from a gold donor etc.

Looking at the UserChat.lua for self broadcasting it seems to go like this: if less than or equal to €5, bronze. Then less than or equal to €15 is silver, then €30 for gold, then €60 for stralite, and once above stralite, voratun.