I'm pretty sure the badge is for donating anything at all. Otherwise it wouldn't be fair, people who can't afford 5 coins at once would feel like "hey, I donated as much as I could, I want a thank-you badge as well D:"
You donated so you get a badge, but the amount you donated is gratified with the certain perks attached. So I guess the badge is for everyone
At least that's what I think, Firn can always correct me
At first I was a bit scared about what people's reactions would be and I was afraid this would divide the community in two groups. But so far it's fine and if it stays that way it might even help with small donations
![Glee :mcglee:](./images/smilies/Gleemochi.png)
People see shiny, people want shiny XD
I cross my heart for that.
![Heart :qh:](./images/smilies/firn_heart.gif)