May not be a serious threat now but even Mobile App based advertisements are at a risk considering the advent of AdGuard (Freemium. Paid is very much affordable) or AdGuard DNS (free). This is the most popular one out there but there are others too which are capable of blocking ads in App UIs.
I don’t consider them as a significant risk now because:
- Google or iOS App Store do not allow them to list. Interested users need to go to their website to download.
- These are popular among geeks & their friends & relatives. So, the user-base is still not large.
But things may change epidemically if Google or Apple changes its policy and allow such apps in the App Store.
Ads are desirable only for Publishers but not for consumers, who are fed up seeing not-so-meaningful ads which sometimes redirect to malicious sites.
TBH, Ad-blockers are harmful for the publishers who publish freeware apps or websites, but it can’t be denied that ad-blockers are here to stay as long as they are in demand. I think the future of advertising will be quite different than what it looks now. For example: App makers may be willing to release much-less-featured freeware version and nudge others to upgrade to payware with better features or some other paid services without using third-party ad-servers [some already do].
Disc. The opinion is personal. I’ve been a tech savvy user & use Ad-blockers. I’ve been a publisher too but prefer to keep website Ad-free & choose to monetize in a different way. You can find relevant reference by searching on Google.