Alright, so coin turnout for this period of open bounties.

Aurelio - 2 Silver or 8 Bronze
Lily & Alex - 1 Gold, 4 Silver, or 16 Bronze
Sann = 1 Gold, 4 Silver, or 16 Bronze + 1 Silver or 4 Bronze 
Sakura - 2 Silver, 8 Bronze
Deni/Ronin -  3 Silver or 12 Bronze
Shane - 3 Silver or 12 Bronze
Gaia - 1 Silver or 4 Bronze
Rose/iris - 3 Bronze
Mariette - 3 Bronze
Oros - 2 Silver or 8 Bronze
Shion - 2 Silver or 8 Bronze
Hilaria - 1 Gold, 4 Silver, or 16 Bronze + 2 Silver or 8 bronze
Aria - 2 Silver or 8 Bronze
Melisa - 1 Silver or 4 Bronze
Anaya - 1 Silver or 4 Bronze

Any complaints about the payout for C rank bounties should be taken up with Ariamis, since he's the one who settled on that value :P