Suggestion about Comodo Engine on virus scanner website.

Sorry if I make this topic in wrong forum .

I’ve seen Comodo place antivirus to scann uploaded files from user.
Such as , and more.

If the uploaded file was not detect by Comodo, What’s next ?
Did they report a result to Comodo virus research center ?
or Nothing happened ?

Normally, if some other scanner picks it up, the file itself is send to the devs…