The marketplace has entierly different licensing.
You should probably read up on it if your asking about that specifically.
The licensing for quixel was changed during the epic merger.
There’s still the possibility of having different licensing if you bought assets from them over 2 years ago / whatever licensing they were using at the time would be what you are technically bound by.
And good luck finding a copy unless you happened to save it… In the end, it was probably still some sort of licensing. As licensing goes, you aren’t usually granted resell permissions.
The thing with marketplace and people stealing and reselling your assets after one purchase is that it happens, it’s obviously illegal, and epic doesn’t give a sh*t about it.
If anything they encourage it by not protecting our rights with lawsuits and DMCA requests against known offenders. That’s out of topic in this discussion though, even if worth a mention.