Thank you for responding @jarvie. I don't have any idea if it's part of Google Ads terms of service, but for SEO perspective having duplicate contents or similar contents with other dApps on Hive is not good for search engine ranking.
A post on PeakD is also visible with Ecency and Hive.blog with similar contents, that is how Hive built with. For us Hive users it's common but I don't think it is good for Google's search ranking.
PeakD will never be affected because you're the top dapps on Hive but what will happen if the other dapps like Ecency or Hive.blog will also follow your footsteps adding Google ads. I don't know how will the search engine reactm but when you search on some keywords, it's hard to rank at the top spot of Google, if PeakD was already ranking.
This is just my personal thoughts on search engine rankings, it is very hard to rank Hive-related keywords on Google. I don't know if it's because of having duplicate contents across multiple Hive dapps or the search engine don't like to show similar contents across various Hive dapps.