Oh yes, you can set up a coupon code. However, your booth will not be on the front page with those having a Bonanza.
It seems that the "Block Party" is where this little unannounced minimum was discovered. Now it would seem to me that Bonanzle would want this "Block Party" to continue. Here is what Bill said in a comment on his blog:
Seems that those were some good sales and fees, which means more money for Bonanzle. At that time there was no minimum 15% discount, it was whatever the seller thought it should be for their business. Most sellers on Bonanzle also sell on other venues. I know that my prices went down coming from e-bay. The fees were lower so I lowered my prices.
So if you are thinking of joining Bonanzle and ever want to have a Bonanza, make sure that your prices are such that you can take the new non announced minimum 15% discount. Maybe make that 20%, considering this came from the help section of setting up your Bonanza.
The average Bonanza discount in Bonanzle's first few months of operation has been about 10-15%. We're hoping it will nudge up closer to 20%... that seems to be about the lower level that gets buyers smelling blood in the water.
Which makes me think that if in the beginning there were no minimums on the discount that you could offer for your Bonanza, then they will soon nudge it to the 20% ,to "get buyers smelling the blood in the water".