There might be artists who want to be dared, but never gets asked. To resolve that we could:
Make a list of all who want to participate. Every participant must submit a dare, and be willing to be dared. The dares are passed out randomly. The generator of the dare is responsible for placing the first bid on the aceo. I think the starting bid should, in this case, be standardized at 0.99 to encourage participants. I know, some of you artists with "skill" and "talent" are used to starting higher, but that goes both ways. Sure, a Mick Reasor Original might sell for way under market value, but does anyone want to spend $10 for a pole-dancing teddybear wearing a sexy nurse outfit with Matt Furey of Sexual Kung Fu fame stuffing dollar bills in her g-string... drawn by, oh, I don't know, me? I thought not.