Thanks for the details, we're looking for them to block them!
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I'm getting the same Facebook ones. Twice in maybe 15 min on the site. Pops up a you are the lucky winner of a chance to spin the wheel. Will not let you navigate out of the page.Just happened to me again. This time it took me to fb.
What browser version are you using?
Are you still getting them?Mobile safari 11 on iPad. Yes the cache had been cleared.
Are you still getting them?
Or was it a one time thing?