Depending on how it is implemented, features like autoclosing can be hijacked for nefarious purposes. Let's say it is done by Chrome "clicking" on the close but

Depending on how it is implemented, features like autoclosing can be hijacked for nefarious purposes. Let's say it is done by Chrome "clicking" on the close button, which it detects by the URL and the element id. Once it is in the database, the website could use the element id on an ad or a link to generate spurious ad views or traffic. They could also do it on a small percentage of users to avoid detection.