Block unwanted/pop-up Ads on iOS browsers So these gift-card Ads seem to be giving me trouble for some reason lately, and it seems like its okay on Safari on iOS but on Google Chrome on iOS,  there seems to be no way to get rid of them.

Other than tapping Ok (which I don't think I have ever done with one of these scam popups) - what do I do?
The best suggestion here is to not open sketchy sites.

Alternatively, you can install one of the many available content blocker or ad blocker apps on the app store. Starting with iOS 9, Apple has started approving Ad blocker apps on the iOS App Store.

Search for "Ad Blocker" on App Store. There are various such free and paid apps available on the App Store.