Taiwan has a vibrant digital economy, characterised by high-speed broadband and the rise of e-commerce sites presented in Traditional Chinese script, providing everything from online auctions, payments and consumer retail. Yet rogue websites are also widely supported in Taiwan, by millions of users whose browsing and clicking activity with ads generates revenue and profit for these rogue sites. The revenue models underpinning rogue websites have only recently received research attention (Taplin, 2013; Watters, 2013a; Watters, 2103b). The accumulation of wealth through advertising on rogue websites diverts revenues from rightsholders, who have invested in creative industries, and threatens the viability of such industries by eroding the earnings base. Yet the greatest risks from advertising on these sites are not primarily financial; instead, these sites represent a clear and present danger to their users, who are often children. While users are often exposed to “mainstream” advertising – juxtaposing household company names with hardcore pornography and other illicit material – “high risk” advertising has been found to comprise the overwhelming majority of ads targeting Australians (Watters, 2013a) and Singaporeans (Watters, 2013b). In this study, we use the methodology developed by Watters (2013a) to assess the prevalence of mainstream and High Risk advertising. A total of 1,000 webpages were sampled from known rogue sites in Taiwan and were downloaded there. Each ad banner was categorised as being High Risk or Mainstream, after each page was verified as being in breach of DMCA for movies and TV from major international studios. 61% of ads were Mainstream, while 39% were High Risk. The prevalence of Mainstream ads being served to Taiwan is very high compared to similar advertising being shown to Australians, Singaporeans and Canadians. Even the Taiwanese government was observed to be advertising on these sites. The policy implications of this result and future research directions, including methodology enhancements, are discussed.