I felt that this was in between a bug and a feature request. I don't know if it's intended behaviour or something the developers forgot. I try to clear the "new" badge on the store button by clicking on all new content in the marketplace (which I'm not a fan of). It's really hard to do this now. The sale icon cannot be removed which is what led me to the assumption that this is not intended behaviour. I believe a simple toggle in the video section of the settings to disable "Notification badges on Store button" would suffice.
Cleaning up old tickets: This ticket has not been updated recently (~1 year+) so is being closed as Cannot Reproduce. If you feel this is still a valid issue then please comment, or create a new ticket following the Issue Guidelines.
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