There is no harm in having ads on school buses. There is absolutely no reason not to and it likely promotes the fiscal circulation. If companies are willing to pay money to the School District to advertise, why not? It would only aid in funding.
Given that, in debate, silence is consent, those judging this debate must vote for the proposition because the opposition has failed to respond to any of my arguments. In addition to this the only reason the opposition has provided to support the case he makes is that the action he is opposing is incongruous with its original use. However, if we where to use things solely for their intended purpose, than Popsicles, microwaves, Coca-cola, LSD, and Slinkies wouldn't exist (all of these were invented by using something for something else other than its "intended" purpose). One of the key ways our society progresses is through re-purposing things. This is merely another opportunity to do so. So, given the opposition has conceded the propositions arguments and failed to uphold its own, those judging must vote pro.