[boba]

There used to be supporter rank for $5. They were only allowed to queue songs and just a tag with extra points. The price for Dtmod increase every few times of the amount it gets bought. It used to be $20, and overtime it increased a lot. Donor don't really have the power to manage the players if you're referring to why they only kick rdmers, instead of slaying or banning. They don't have that power.

Donor:
gag/mute
ungag/unmute
kick
queue
vote
normal player stuff like psay

Dtmod:
normal player + donor stuff
slay
aslay/aslayid
rdm management logs
karma reset
warn... unless this is actually moved back to mod instead

Mod:
normal dtmod stuff
ban/banid
slap

That's all I remember.