I am planning to use PPC to promote affiliate offers. Does anybody know if Yahoo and MSN have problems with direct linking to offers or using an iframe? Also, how do you create subaccounts on Yahoo, MSN, and Google Adwords? Can I use multiple vouchers for the one account I have on MSN adcenter and Google Adwords? What is a good link cloaker that will 100% cloak my link so that others won't steal my keywords? Any help is much appreciated.