Not trying to be rude or pushy, but does anyone have an idea?
The lack of response kind of mirrors my attempt at uploading. No feedback whatsoever. :/
To provide a useful idea rather than just sounding like I'm complaining, there could be a confirmation sent to the user whenever a milestone is reached or a way to check and inquire its progress. I would feel more aware if I knew the actual process you guys go through to check submitted covers, but my understanding is something like:
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UserJoe69 submitted Sonic_Blast_from_the_Past_17.jpg for the Nintendo Switch Plus
[Checkbox] [Checked] Admin 1 - Approved
[Checkbox] [Checked] Admin 2 - Approved
[Checkbox] [Not Checked] Admin 3 - Waiting for Approval
Thanks for contributing to TheCoverProject! Every bit helps.

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With feedback emailed or DM'ed once the cover is done being inspected.
Approved:
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Cover approved!
Check it out here:
thecoverproject.net/NS+/Sonic_Blast_from_the_Past_17.jpg
Thanks for contributing!
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Or denied:
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Cover denied.
Reason for denial:
Fuzzy image. Please make sure the scan is 300dpi.
Thanks for contributing!
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It's probably way more formal than you intend, but just an idea from an outside contributor's point of view. Some kind of status check would be awesome.