I too got redirected to a page allegedly from my ISP [Virgin Media] offering a prize to take a survey??? Closed the browser and went back in with no issues. Maybe a Beware moment....
Yes it’s happened to me before but not for a while now. Seems to be an issue with the sites adverts from what I’ve guessed before. It’ll redirect you to a website that might look safe but it’s a phishing site and it’ll usually say oh click here to claim a prize or whatever. The fix for this is simply to delete your cookies, browser cache and history completely. Annoyingly this’ll mean you have to re-log in to Sites like Facebook if you have the “remember me” option ticked on the site or in chrome, Firefox etc.. Maybe worth a quick email to the Website admins to inform them?