OpenX and co throws money in the cat and mouse game to police ads that seem decent but pounces on grandmas in Azerbaijan using a 4 year old Android by a defunct

OpenX and co throws money in the cat and mouse game to police ads that seem decent but pounces on grandmas in Azerbaijan using a 4 year old Android by a defunct phone maker on Christmas eve. What is the reason for using Javascript instead of a dumb img tag? What is the reason for platforms to allow advertisers to push malware to user instead of their own impression tracking scripts?