Thanks for throwing this question our way, I have a couple of answers for ya. We have seen these forms of malicious creatives more often throughout the industry as well. Sovrn recently partnered with a fraud tracking and prevention company, Confiant. With this technology, we are actively scanning and blocking these types of creatives from serving through our network.
Also, your concern about high cpu usage is completely warranted but actually unrelated to these creative types. If you have further questions or concerns feel free to post them here or reach out to us directly at email@example.com