Concerning the adspace in panel the 5th: THIS is the choicest and most elegant adspace you shall ever bid on. His excellency, Master Triangle, requires the sum of no less than $100.00 per day to advertise in this space. In return, Triangle shall do you the grace of declaring that he takes umbrage to whatever you, the honorable winner, shall deem appropriate. Consider the pride and distinction you would indeed possess should you own that adspace for even a few short minutes. Please direct all bidding here.
ALSO, have a look at this post on FLEEN,
discussing the subversiveness of ads in comics! Leave him a comment for goodness sake :) It's quite an informative blog, I must say, and well written!