If I do post them here, and eventually a right holder complains, then the money made from the ones already sold is lost or refunded?
Edit: Grammar
If you try to earn money from someone else’s work, and they didn’t in any way allow you to do that, they possibly can sue for the full amount, possibly more if you’ve somehow managed to damage their brand.
I’m not a lawyer, my only advice is, don’t do something with the work of a creator without explicit consent.
When a random user looks at those logos, will they think it’s that company’s logo? If the answer is 100% yes without a doubt, then it could cause you problems.
Fair use does not apply if you create the logo from scratch. Fair use is for cases like for example when someone is reviewing a game from a company, and showing the company’s logo as a result.