How do I get the congratulations your a winner pop up to stop?

What a useless answer.... you advised she do exactly what she had already done. The original question was posted because your advised solution wasn’t working. I have the same problem and have closed and erased as you’ve prescribed several times before coming here. Please provide a real answer this time.

I need the answer to this question also. Since the latest update to my iPhone and iPad I have had this problem and it just will not go away. I have done the recommended closing of the app. Double tapping home button and swiping it out of opened apps. Going to settings and clearing cookies and data. I have pop up block on and i still get this annoying pop up. It is driving me crazy. I keep getting one that says congrats amazon customer.....

why is there no real way to prevent this?

I found something that helped me but I don't think it is a blanket fix for the issue. I found a YouTube video that showed how clearing the history doesn't work at preventing the pop-up, but you can set up a restriction so that your phone never goes to that website and that has helped me. The other problem with that is mine was routing me to several websites. I restricted each one and it has helped. Here is the YouTube video: How to remove malware / Virus from iPad iPhone Safari - YouTube

Here are the instructions if you don't want to watch the video:

Settings > General > Restrictions > Enter your code (If you don't remember ever setting one up, try a four digit lock code you used in the past, that worked for me.) > Websites > Click on Limit Adult Content > and then under the Never Allow section at the bottom click Add a Website > Enter the websites that the blasted pop-up is routing you to.

Voila! I hope this helps others! I hope Apple gets to the bottom of this soon as it is clearly people taking advantage of a weakness in the system.

Double-click on the Home button, then slide Safari up to quit it.

Go to Settings > Safari > tap on Clear History and Web Data.

I tried your fix and it worked-so far so good! Thank you.

Did not work!

Did not work clearing the history. I haven’t done the restriction on the website because it’s a recipe website I use often. APPLE FIX THIS PROBLEM!!