[r3bl]

Seven days after the patch, not after disclosure with Epic.

Epic patched it on August 17th, Google waited 7 more days (as it is their usual practice) and then they went public.

Issue tracker makes more sense than the article IMO: https://issuetracker.google.com/issues/112630336

I guess that usually seven days is more than enough for everyone to update to the latest version available on the Play store, however downloading a giant .apk file within seven days is an inconvenience for most users, which is why Epic requested 90.

[detaro]

Also, Playstore checks for you in the background for updates even if you don't use the app in question, the Fortnite launcher doesn't.