Well, since taxes are not based on gross income but on NET income (profits), I guess your tax problem isn't nearly as big as you originally thought it to be.
"Did you know Thomas Edison tried and failed nearly one thousand times to create the incondecent filament for the light bulb and when asked about it he said I didn't fail, I just found 1000 ways how not to make a light bulb but I only need to find 1 way to make it work".
Basically said as "For each failure your one step closer to success".
As a note to this thread, listen to the numbers and keep your personal opinions out of this business, if the numbers are telling you to pull the offer, then pull it, if they are telling you to keep increasing your ad spend then keep spending more until it caps, then slow back.